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  • An Integrative Approach to Leader Development: Connecting Adult Development, Identity, and Expertise
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Buy from Amazon $54.99$9.29 $45.00 $35.00 $25.00 $15.00 $5.00 Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr 2014 2015 2016 $42.77, Oct 16 - Jan 1$42.55, Jan 3 - Jan 25$44.33, Jan 25 - Feb 13$47.45, Feb 14 - Feb 22$44.33, Feb 23 - May 3$44.33, Feb 23 - May 3$44.29, May 3 7:51 am$40.34, May 3 7:51 am$46.42, May 4 - Jun 29$44.25, May 5 6:55 am$41.04, May 5 - May 15$46.42, May 4 - Jun 29$44.22, May 8 4:26 am$41.04, May 5 - May 15$46.42, May 4 - Jun 29$44.18, May 10 - May 11$41.04, May 5 - May 15$46.42, May 4 - Jun 29$44.15, May 12 10:18 pm$41.04, May 5 - May 15$46.42, May 4 - Jun 29$44.12, May 14 12:31 pm$41.04, May 5 - May 15$46.42, May 4 - Jun 29$44.06, May 17 3:24 pm$40.00, May 17 - Aug 9$46.42, May 4 - Jun 29$44.03, May 19 - May 21$40.00, May 17 - Aug 9$46.42, May 4 - Jun 29$44.02, May 22 2:36 am$40.00, May 17 - Aug 9$46.42, May 4 - Jun 29$43.98, May 24 - May 25$40.00, May 17 - Aug 9$46.42, May 4 - Jun 29$43.93, May 27 3:08 am$40.00, May 17 - Aug 9$46.42, May 4 - Jun 29$43.90, May 29 12:19 am$40.00, May 17 - Aug 9$46.42, May 4 - Jun 29$43.84, May 31 5:22 pm$40.00, May 17 - Aug 9$46.42, May 4 - Jun 29$43.82, Jun 1 - Jun 11$40.00, May 17 - Aug 9$46.42, May 4 - Jun 29$45.81, Jun 14 8:30 pm$40.00, May 17 - Aug 9$46.42, May 4 - Jun 29$45.82, Jun 16 - Jun 17$40.00, May 17 - Aug 9$46.42, May 4 - Jun 29$45.83, Jun 17 - Jun 19$40.00, May 17 - Aug 9$46.42, May 4 - Jun 29$45.33, Jun 20 - Jun 22$40.00, May 17 - Aug 9$46.42, May 4 - Jun 29$45.32, Jun 23 - Jun 24$40.00, May 17 - Aug 9$46.42, May 4 - Jun 29$45.34, Jun 27 - Jun 30$40.00, May 17 - Aug 9$47.45, Jun 30 - Aug 15$45.34, Jul 3 - Jul 4$40.00, May 17 - Aug 9$47.45, Jun 30 - Aug 15$46.44, Jul 5 - Jul 7$40.00, May 17 - Aug 9$47.45, Jun 30 - Aug 15$47.43, Jul 8 - Jul 9$40.00, May 17 - Aug 9$47.45, Jun 30 - Aug 15$47.42, Jul 17 - Jul 30$40.00, May 17 - Aug 9$47.45, Jun 30 - Aug 15$47.43, Jul 30 - Jul 31$40.00, May 17 - Aug 9$47.45, Jun 30 - Aug 15$47.42, Aug 5 10:19 am$40.00, May 17 - Aug 9$47.45, Jun 30 - Aug 15$47.43, Aug 6 - Aug 7$40.00, May 17 - Aug 9$47.45, Jun 30 - Aug 15$45.90, Aug 9 12:35 pm$40.00, May 17 - Aug 9$47.45, Jun 30 - Aug 15$47.42, Aug 11 7:46 pm$41.56, Aug 10 - Aug 16$47.45, Jun 30 - Aug 15$47.43, Aug 13 - Aug 14$41.56, Aug 10 - Aug 16$47.44, Aug 16 - Aug 22$47.43, Aug 16 - Aug 17$41.56, Aug 10 - Aug 16$47.44, Aug 16 - Aug 22$47.41, Aug 18 9:59 pm$41.55, Aug 17 - Aug 20$47.44, Aug 16 - Aug 22$47.42, Aug 20 - Aug 22$45.54, Aug 21 - Aug 22$47.64, Aug 24 - Aug 27$47.43, Aug 23 - Aug 28$47.42, Aug 24 4:01 am$47.64, Aug 24 - Aug 27$47.43, Aug 23 - Aug 28$47.39, Aug 26 7:21 am$51.32, Aug 28 - Aug 29$47.43, Aug 23 - Aug 28$47.41, Aug 28 11:12 am$47.42, Aug 29 - Aug 30$47.41, Aug 30 6:25 pm$42.50, Aug 30 - Sep 3$47.41, Aug 31 - Sep 4$47.39, Sep 2 - Sep 8$42.50, Aug 30 - Sep 3$47.62, Sep 4 12:15 pm$47.41, Aug 31 - Sep 4$47.39, Sep 2 - Sep 8$48.33, Sep 5 - Sep 9$47.40, Sep 5 - Sep 10$47.39, Sep 2 - Sep 8$48.33, Sep 5 - Sep 9$47.40, Sep 5 - Sep 10$46.93, Sep 9 7:22 am$51.32, Sep 11 4:16 pm$47.39, Sep 11 - Sep 20$46.92, Sep 10 - Sep 11$48.33, Sep 12 - Sep 25$47.39, Sep 11 - Sep 20$47.17, Sep 12 8:24 pm$48.33, Sep 12 - Sep 25$47.39, Sep 11 - Sep 20$46.75, Sep 16 6:07 pm$48.33, Sep 12 - Sep 25$47.39, Sep 11 - Sep 20$46.43, Sep 18 7:29 pm$48.33, Sep 12 - Sep 25$47.39, Sep 11 - Sep 20$46.17, Sep 20 8:16 pm$48.33, Sep 12 - Sep 25$47.38, Sep 23 - Sep 27$45.73, Sep 23 5:35 am$48.33, Sep 12 - Sep 25$47.38, Sep 23 - Sep 27$45.45, Sep 25 8:56 am$48.99, Sep 27 - Sep 29$47.38, Sep 23 - Sep 27$43.30, Sep 27 11:23 am$48.99, Sep 27 - Sep 29$47.37, Sep 29 - Dec 14$42.85, Sep 29 1:14 pm$53.62, Oct 1 3:41 pm$47.37, Sep 29 - Dec 14$42.40, Oct 1 3:41 pm$47.96, Oct 3 - Oct 7$47.37, Sep 29 - Dec 14$41.86, Oct 5 7:31 pm$47.96, Oct 3 - Oct 7$47.37, Sep 29 - Dec 14$41.52, Oct 7 9:42 pm$48.75, Oct 10 - Oct 19$47.37, Sep 29 - Dec 14$41.12, Oct 10 2:28 am$48.75, Oct 10 - Oct 19$47.37, Sep 29 - Dec 14$44.08, Oct 12 3:45 am$48.75, Oct 10 - Oct 19$47.37, Sep 29 - Dec 14$43.98, Oct 14 - Oct 28$47.37, Sep 29 - Dec 14$43.98, Oct 14 - Oct 28$40.26, Oct 21 - Oct 23$47.37, Sep 29 - Dec 14$43.98, Oct 14 - Oct 28$36.26, Oct 28 1:59 pm$47.37, Sep 29 - Dec 14$43.87, Oct 31 7:50 am$33.90, Oct 31 - Nov 12$47.37, Sep 29 - Dec 14$43.43, Nov 7 1:32 pm$33.90, Oct 31 - Nov 12$47.37, Sep 29 - Dec 14$43.37, Nov 12 - Nov 19$33.90, Oct 31 - Nov 12$48.76, Nov 17 - Nov 27$47.37, Sep 29 - Dec 14$43.37, Nov 12 - Nov 19$48.76, Nov 17 - Nov 27$47.37, Sep 29 - Dec 14$43.36, Nov 20 11:21 pm$48.76, Nov 17 - Nov 27$47.37, Sep 29 - Dec 14$43.34, Nov 23 2:40 am$48.76, Nov 17 - Nov 27$47.37, Sep 29 - Dec 14$43.32, Nov 25 7:19 am$48.76, Nov 17 - Nov 27$47.37, Sep 29 - Dec 14$43.27, Nov 27 5:22 am$48.75, Nov 29 - Dec 3$47.37, Sep 29 - Dec 14$43.15, Dec 1 1:22 am$48.75, Nov 29 - Dec 3$47.37, Sep 29 - Dec 14$43.08, Dec 3 12:59 am$54.99, Dec 4 - Dec 11$47.37, Sep 29 - Dec 14$43.11, Dec 4 10:56 pm$54.99, Dec 4 - Dec 11$47.37, Sep 29 - Dec 14$43.08, Dec 6 8:03 pm$54.99, Dec 4 - Dec 11$47.37, Sep 29 - Dec 14$43.05, Dec 8 10:12 pm$54.99, Dec 4 - Dec 11$47.37, Sep 29 - Dec 14$42.98, Dec 11 3:51 am$48.75, Dec 13 - Dec 14$47.37, Sep 29 - Dec 14$42.83, Dec 14 11:04 pm$49.00, Dec 16 - Dec 21$47.45, Dec 16 - Dec 21$42.80, Dec 16 10:17 pm$49.00, Dec 16 - Dec 21$47.45, Dec 16 - Dec 21$42.71, Dec 21 7:46 pm$47.44, Dec 31 - Jan 11$47.21, Dec 31 - Jan 2$42.36, Dec 31 - Jan 2$47.44, Dec 31 - Jan 11$46.97, Jan 11 12:07 pm$42.31, Jan 11 - Jan 13$46.73, Jan 12 - Jan 18$42.30, Jan 14 - Jan 15$39.46, Jan 12 - Jan 14$49.00, Jan 16 - Jan 21$46.73, Jan 12 - Jan 18$42.28, Jan 16 8:29 am$49.00, Jan 16 - Jan 21$46.73, Jan 12 - Jan 18$42.25, Jan 18 2:14 am$49.00, Jan 16 - Jan 21$46.49, Jan 19 - Jan 26$42.16, Jan 21 7:23 am$48.75, Jan 22 - Jan 26$46.49, Jan 19 - Jan 26$42.14, Jan 22 10:17 pm$48.75, Jan 22 - Jan 26$46.49, Jan 19 - Jan 26$42.07, Jan 26 5:08 am$48.76, Jan 27 - Jan 29$46.25, Jan 27 - Jan 31$42.06, Jan 27 10:51 pm$48.76, Jan 27 - Jan 29$46.25, Jan 27 - Jan 31$42.04, Jan 29 2:52 pm$48.75, Jan 31 - Feb 13$46.01, Feb 2 - Apr 1$42.00, Feb 2 - Feb 3$48.75, Jan 31 - Feb 13$46.01, Feb 2 - Apr 1$41.98, Feb 4 10:20 pm$48.75, Jan 31 - Feb 13$46.01, Feb 2 - Apr 1$41.96, Feb 6 4:46 pm$48.75, Jan 31 - Feb 13$46.01, Feb 2 - Apr 1$41.94, Feb 8 11:55 am$48.75, Jan 31 - Feb 13$46.01, Feb 2 - Apr 1$41.80, Feb 12 2:37 am$48.75, Jan 31 - Feb 13$46.01, Feb 2 - Apr 1$41.75, Feb 13 9:13 pm$48.74, Feb 15 5:52 pm$46.01, Feb 2 - Apr 1$41.95, Feb 15 5:52 pm$48.75, Feb 17 - Feb 19$46.01, Feb 2 - Apr 1$41.91, Feb 17 4:32 pm$48.74, Feb 20 - Feb 28$46.01, Feb 2 - Apr 1$41.88, Feb 20 - Feb 22$48.74, Feb 20 - Feb 28$46.01, Feb 2 - Apr 1$41.80, Feb 24 9:39 am$48.74, Feb 20 - Feb 28$46.01, Feb 2 - Apr 1$42.01, Feb 28 - Mar 10$49.00, Mar 2 - Mar 11$46.01, Feb 2 - Apr 1$42.01, Feb 28 - Mar 10$49.00, Mar 2 - Mar 11$46.01, Feb 2 - Apr 1$42.00, Mar 11 7:43 am$48.75, Mar 13 1:54 pm$46.01, Feb 2 - Apr 1$41.97, Mar 13 1:54 pm$49.01, Mar 16 3:51 pm$46.01, Feb 2 - Apr 1$41.93, Mar 16 3:51 pm$48.75, Mar 18 - Mar 23$46.01, Feb 2 - Apr 1$41.89, Mar 18 6:19 pm$48.75, Mar 18 - Mar 23$46.01, Feb 2 - Apr 1$41.79, Mar 21 12:01 am$48.75, Mar 18 - Mar 23$46.01, Feb 2 - Apr 1$41.70, Mar 23 7:36 am$47.70, Mar 25 2:11 pm$46.01, Feb 2 - Apr 1$41.63, Mar 25 2:11 pm$47.71, Mar 27 9:34 pm$46.01, Feb 2 - Apr 1$41.58, Mar 27 9:34 pm$47.70, Mar 30 - Apr 9$46.01, Feb 2 - Apr 1$41.42, Mar 30 5:47 am$47.70, Mar 30 - Apr 9$46.01, Feb 2 - Apr 1$41.39, Apr 1 4:13 pm$47.70, Mar 30 - Apr 9$45.77, Apr 4 - Apr 23$41.27, Apr 4 7:14 am$47.70, Mar 30 - Apr 9$45.77, Apr 4 - Apr 23$41.08, Apr 6 10:54 pm$47.70, Mar 30 - Apr 9$45.77, Apr 4 - Apr 23$40.99, Apr 9 3:53 pm$47.71, Apr 12 12:45 pm$45.77, Apr 4 - Apr 23$40.87, Apr 12 12:45 pm$53.76, Apr 15 8:51 am$45.77, Apr 4 - Apr 23$40.85, Apr 15 8:51 am$53.71, Apr 17 9:55 pm$45.77, Apr 4 - Apr 23$40.75, Apr 17 9:55 pm$53.58, Apr 20 12:05 pm$45.77, Apr 4 - Apr 23$40.69, Apr 20 12:05 pm$47.70, Apr 23 6:29 am$45.77, Apr 4 - Apr 23$40.67, Apr 23 6:29 am$47.95, Apr 26 - Apr 29$45.53, Apr 26 - Apr 29$40.58, Apr 26 7:27 am$47.95, Apr 26 - Apr 29$45.53, Apr 26 - Apr 29$40.94, Apr 29 6:25 am$45.30, May 2 - May 7$41.69, May 2 - May 4$38.29, May 2 1:15 am$45.30, May 2 - May 7$41.69, May 2 - May 4$37.49, May 4 3:15 pm$45.30, May 2 - May 7$37.48, May 7 10:48 pm$37.47, May 7 10:48 pm$45.07, May 11 1:11 pm$41.14, May 11 - May 14$37.49, May 11 - Jun 13$44.84, May 14 - May 19$41.14, May 11 - May 14$37.49, May 11 - Jun 13$44.84, May 14 - May 19$42.25, May 19 12:30 am$37.49, May 11 - Jun 13$44.70, May 23 - Jul 25$42.04, May 23 - May 27$37.49, May 11 - Jun 13$44.70, May 23 - Jul 25$41.66, Jun 1 2:11 am$37.49, May 11 - Jun 13$44.70, May 23 - Jul 25$41.40, Jun 5 4:59 pm$37.49, May 11 - Jun 13$44.70, May 23 - Jul 25$41.13, Jun 9 10:55 pm$37.49, May 11 - Jun 13$44.70, May 23 - Jul 25$41.69, Jun 13 - Jun 17$37.49, May 11 - Jun 13$44.70, May 23 - Jul 25$41.69, Jun 13 - Jun 17$37.69, Jun 17 - Jun 27$44.70, May 23 - Jul 25$42.25, Jun 21 - Jun 23$37.69, Jun 17 - Jun 27$44.70, May 23 - Jul 25$42.51, Jun 27 1:55 am$37.69, Jun 17 - Jun 27$47.68, Jun 29 - Jul 3$44.70, May 23 - Jul 25$42.79, Jun 29 4:06 am$47.68, Jun 29 - Jul 3$44.70, May 23 - Jul 25$42.19, Jul 3 8:52 am$47.87, Jul 7 - Jul 16$44.70, May 23 - Jul 25$42.13, Jul 7 1:55 pm$47.87, Jul 7 - Jul 16$44.70, May 23 - Jul 25$41.58, Jul 10 - Jul 13$47.87, Jul 7 - Jul 16$44.70, May 23 - Jul 25$42.23, Jul 16 - Jul 18$45.76, Jul 18 - Jul 22$44.70, May 23 - Jul 25$42.23, Jul 16 - Jul 18$45.76, Jul 18 - Jul 22$44.70, May 23 - Jul 25$42.17, Jul 22 6:35 am$44.70, May 23 - Jul 25$42.38, Jul 25 - Jul 27$38.48, Jul 25 7:45 pm$45.54, Jul 27 3:09 pm$45.35, Jul 27 - Jul 31$42.38, Jul 25 - Jul 27$45.80, Jul 31 6:03 am$45.35, Jul 27 - Jul 31$42.21, Jul 31 6:03 am$45.80, Aug 3 - Aug 15$45.68, Aug 3 - Aug 7$42.28, Aug 3 7:42 pm$45.80, Aug 3 - Aug 15$45.68, Aug 3 - Aug 7$42.29, Aug 7 10:29 am$45.80, Aug 3 - Aug 15$45.45, Aug 11 7:19 am$41.83, Aug 11 7:19 am$45.80, Aug 3 - Aug 15$45.68, Aug 15 2:00 am$42.28, Aug 15 2:00 am$46.25, Aug 18 - Aug 20$42.30, Aug 18 - Aug 20$41.95, Aug 18 - Aug 30$46.71, Aug 24 - Aug 30$42.71, Aug 26 - Aug 30$41.95, Aug 18 - Aug 30$47.17, Sep 2 9:55 pm$43.17, Sep 2 - Sep 6$40.00, Sep 2 9:55 pm$47.64, Sep 6 - Sep 10$43.17, Sep 2 - Sep 6$39.56, Sep 6 7:36 pm$47.64, Sep 6 - Sep 10$43.64, Sep 10 5:21 pm$39.13, Sep 10 5:21 pm$45.44, Sep 14 1:45 pm$44.59, Sep 14 1:45 pm$38.61, Sep 14 1:45 pm$44.59, Sep 14 1:45 pm$42.21, Sep 18 10:34 am$41.95, Sep 18 - Sep 22$44.59, Sep 14 1:45 pm$41.95, Sep 18 - Sep 22$40.43, Sep 22 8:44 am$44.59, Sep 14 1:45 pm$37.52, Sep 26 6:51 am$37.52, Sep 26 6:51 am$44.59, Sep 14 1:45 pm$31.73, Sep 30 5:36 am$31.73, Sep 30 5:36 am$44.59, Sep 14 1:45 pm$35.00, Oct 4 7:32 am$25.78, Oct 4 7:32 am$44.59, Sep 14 1:45 pm$30.14, Oct 8 10:16 am$20.58, Oct 8 10:16 am$44.59, Sep 14 1:45 pm$15.10, Oct 14 12:12 pm$15.10, Oct 14 12:12 pm$44.59, Sep 14 1:45 pm$12.64, Oct 18 8:30 am$12.64, Oct 18 8:30 am$44.59, Sep 14 1:45 pm$11.06, Oct 20 7:48 am$11.06, Oct 20 7:48 am$38.99, Oct 24 4:45 am$33.86, Oct 24 4:45 am$9.29, Oct 24 - Oct 25$43.84, Oct 25 9:21 am$39.83, Oct 25 9:21 am$9.29, Oct 24 - Oct 25$44.70, Oct 29 - Oct 30$41.23, Oct 30 11:50 am$35.00, Oct 30 - Dec 28$45.14, Nov 3 - Nov 8$41.79, Nov 3 - Nov 4$35.00, Oct 30 - Dec 28$45.14, Nov 3 - Nov 8$41.14, Nov 8 - Nov 10$35.00, Oct 30 - Dec 28$45.58, Nov 10 - Nov 15$41.14, Nov 8 - Nov 10$35.00, Oct 30 - Dec 28$45.58, Nov 10 - Nov 15$41.58, Nov 15 1:50 am$35.00, Oct 30 - Dec 28$46.42, Nov 19 - Dec 8$42.42, Nov 19 10:58 am$35.00, Oct 30 - Dec 28$46.42, Nov 19 - Dec 8$42.41, Nov 23 8:44 pm$35.00, Oct 30 - Dec 28$46.42, Nov 19 - Dec 8$42.35, Nov 28 11:32 am$35.00, Oct 30 - Dec 28$46.42, Nov 19 - Dec 8$42.29, Dec 3 8:29 am$35.00, Oct 30 - Dec 28$46.42, Nov 19 - Dec 8$42.25, Dec 8 6:19 am$35.00, Oct 30 - Dec 28$42.25, Dec 8 6:19 am$40.73, Dec 13 8:09 am$35.00, Oct 30 - Dec 28$42.25, Dec 8 6:19 am$39.21, Dec 18 10:53 am$35.00, Oct 30 - Dec 28$42.25, Dec 8 6:19 am$39.15, Dec 23 - Jan 2$35.00, Oct 30 - Dec 28$42.25, Dec 8 6:19 am$39.15, Dec 23 - Jan 2$33.28, Jan 2 5:26 am$43.84, Jan 7 - Feb 1$40.57, Jan 7 2:34 am$35.00, Jan 7 2:34 am$43.84, Jan 7 - Feb 1$40.24, Jan 12 - Jan 17$39.84, Jan 12 - Jan 19$43.84, Jan 7 - Feb 1$39.84, Jan 12 - Jan 19$38.55, Jan 19 1:36 pm$43.84, Jan 7 - Feb 1$39.60, Jan 24 2:18 pm$36.78, Jan 24 2:18 pm$43.84, Jan 7 - Feb 1$39.50, Jan 27 4:32 am$36.42, Jan 27 4:32 am$43.84, Jan 7 - Feb 1$39.28, Feb 1 - Feb 3$34.83, Feb 1 3:38 am$43.73, Feb 3 5:13 pm$39.28, Feb 1 - Feb 3$34.78, Feb 3 - Feb 8$42.42, Feb 8 7:39 pm$39.02, Feb 8 7:39 pm$34.78, Feb 3 - Feb 8$41.16, Feb 14 1:47 am$38.96, Feb 14 1:47 am$33.29, Feb 14 1:47 am$41.99, Feb 19 10:11 am$38.37, Feb 19 10:11 am$33.15, Feb 19 10:11 am$43.06, Feb 24 11:04 pm$38.23, Feb 24 11:04 pm$29.25, Feb 24 11:04 pm$43.84, Mar 5 - Mar 17$38.44, Mar 5 2:08 pm$34.78, Mar 5 - Mar 17$43.84, Mar 5 - Mar 17$39.28, Mar 17 3:20 am$34.78, Mar 5 - Mar 17$42.02, Mar 28 2:49 pm$38.02, Mar 28 2:49 pm$33.17, Mar 28 2:49 pm 32,2551,172,770 1,562,500 1,041,667 520,833 Oct Dec Feb Apr Jun Aug Oct Dec Feb Apr 2015 2016

Price Details

New

Last Seen $42.02 Mar 28, '16
Highest $47.64 Sep 6, '15
Lowest $11.06 Oct 20, '15
Average $43.84 (30d avg)
$42.95 (90d avg)
$40.51 (180d avg)
$42.73 (365d avg)
$44.49 (Lifetime average)
Added Oct 16, 2013

3rd Party New

Last Seen $38.02 Mar 28, '16
Highest $47.45 Jul 16, '14
Lowest $33.86 Oct 24, '15
Average $38.86 (30d avg)
$39.13 (90d avg)
$40.40 (180d avg)
$41.51 (365d avg)
$42.76 (Lifetime average)
Added Oct 16, 2013

3rd Party Used

Last Seen $33.17 Mar 28, '16
Highest $54.99 Dec 4, '14
Lowest $9.29 Oct 24, '15
Average $34.78 (30d avg)
$34.74 (90d avg)
$32.57 (180d avg)
$37.68 (365d avg)
$41.07 (Lifetime average)
Added Oct 16, 2013

Sales Rank

30 day average: 676,614
90 day average: 667,013

Product Description

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