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Buy from Amazon $238.30$10.89 $200.00 $150.00 $100.00 $50.00 Aug Nov Feb May Aug Nov Feb May Aug Nov Feb May 2013 2014 2015 2016 $44.96, May 12 - Aug 9$44.51, Jul 11 - Aug 9$44.96, Jul 30 - Aug 11$33.41, Aug 20 5:15 pm$44.96, Aug 29 - Jan 25$238.27, May 4 4:53 am$95.00, May 3 - May 9$237.79, May 6 10:11 pm$95.00, May 3 - May 9$237.15, May 9 9:28 pm$95.00, May 3 - May 9$236.71, May 12 8:31 pm$55.00, May 12 8:31 pm$235.91, May 14 - May 16$72.64, May 14 5:55 pm$235.83, May 17 3:43 pm$95.91, May 17 - May 20$235.72, May 20 - Jun 3$95.91, May 17 - May 20$235.72, May 20 - Jun 3$121.88, May 22 - May 24$235.72, May 20 - Jun 3$120.00, May 24 - May 26$235.72, May 20 - Jun 3$121.88, May 27 - May 29$235.72, May 20 - Jun 3$59.94, May 30 - Jun 3$189.90, Jun 4 6:07 am$59.93, Jun 4 6:07 am$179.51, Jun 6 9:48 am$49.94, Jun 6 9:48 am$181.07, Jun 9 6:21 pm$60.00, Jun 9 - Jun 10$162.95, Jun 12 1:05 am$49.90, Jun 12 1:05 am$151.07, Jun 14 7:03 pm$49.64, Jun 14 7:03 pm$139.05, Jun 17 7:48 pm$49.51, Jun 17 7:48 pm$132.90, Jun 20 - Jun 21$49.43, Jun 20 - Jun 27$130.20, Jun 22 - Jun 23$49.43, Jun 20 - Jun 27$129.99, Jun 26 - Jun 29$49.43, Jun 20 - Jun 27$129.99, Jun 26 - Jun 29$69.94, Jun 28 - Jul 1$130.34, Jun 30 - Jul 1$69.94, Jun 28 - Jul 1$235.91, Jul 4 - Jul 9$76.53, Jul 4 6:03 pm$235.91, Jul 4 - Jul 9$99.99, Jul 7 3:58 am$235.91, Jul 4 - Jul 9$95.00, Jul 9 6:37 pm$197.26, Jul 12 6:13 am$95.90, Jul 12 6:13 am$192.60, Jul 14 10:32 pm$95.82, Jul 14 10:32 pm$189.97, Jul 18 - Jul 25$59.50, Jul 18 9:23 pm$189.97, Jul 18 - Jul 25$65.87, Jul 20 11:18 pm$189.97, Jul 18 - Jul 25$87.95, Jul 23 - Jul 25$175.00, Jul 25 - Jul 30$87.92, Jul 26 6:37 pm$175.00, Jul 25 - Jul 30$85.99, Jul 29 12:07 pm$174.50, Jul 31 - Aug 1$69.91, Aug 1 5:26 am$154.98, Aug 3 11:40 pm$53.47, Aug 3 11:40 pm$149.59, Aug 7 12:43 am$53.37, Aug 7 12:43 am$50.00, Aug 10 - Aug 12$49.99, Aug 10 1:44 am$50.00, Aug 10 - Aug 12$48.93, Aug 12 11:21 pm$49.98, Aug 15 9:01 pm$39.52, Aug 15 9:01 pm$49.97, Aug 17 - Aug 19$38.04, Aug 17 11:40 pm$49.96, Aug 20 - Aug 21$31.99, Aug 20 3:52 pm$45.00, Aug 23 - Aug 24$24.85, Aug 23 3:22 pm$49.93, Aug 26 - Aug 27$22.99, Aug 26 7:11 pm$49.92, Aug 29 - Aug 30$21.98, Aug 29 12:34 am$49.91, Aug 31 - Sep 1$48.00, Aug 31 - Sep 1$49.90, Sep 2 - Sep 3$48.00, Sep 3 9:51 pm$49.88, Sep 6 - Sep 8$47.98, Sep 6 - Sep 7$49.87, Sep 9 - Sep 11$47.76, Sep 9 10:50 pm$49.86, Sep 12 7:43 am$47.63, Sep 12 7:43 am$49.85, Sep 13 - Sep 14$41.89, Sep 14 11:55 am$48.99, Sep 18 - Sep 19$40.31, Sep 18 12:46 pm$48.98, Sep 20 - Sep 22$40.07, Sep 20 4:14 pm$48.97, Sep 23 - Sep 25$39.69, Sep 23 11:41 pm$48.70, Sep 26 - Sep 27$38.77, Sep 26 3:30 am$48.69, Sep 28 - Sep 30$38.70, Sep 28 7:35 am$48.68, Oct 2 - Oct 3$34.93, Oct 2 10:36 am$48.67, Oct 4 - Oct 6$34.88, Oct 4 3:58 pm$48.67, Oct 4 - Oct 6$34.85, Oct 6 5:41 pm$48.66, Oct 8 - Oct 10$34.65, Oct 10 9:25 pm$48.65, Oct 11 - Oct 14$34.64, Oct 11 11:21 pm$48.64, Oct 16 7:00 am$34.50, Oct 16 7:00 am$48.63, Oct 17 - Oct 20$34.49, Oct 17 - Oct 19$84.54, Oct 22 2:13 am$34.44, Oct 20 - Oct 22$163.68, Oct 24 9:29 am$34.43, Oct 23 - Oct 24$160.72, Oct 26 4:58 pm$34.42, Oct 26 4:58 pm$157.44, Oct 29 3:33 pm$34.41, Oct 29 3:33 pm$140.28, Nov 4 3:53 am$34.39, Nov 4 3:53 am$113.14, Nov 10 6:51 am$30.00, Nov 10 6:51 am$102.28, Nov 12 10:24 pm$29.99, Nov 12 10:24 pm$76.47, Nov 17 6:05 am$25.71, Nov 17 6:05 am$60.93, Nov 19 11:23 pm$17.60, Nov 19 11:23 pm$70.40, Nov 23 2:37 am$18.33, Nov 23 2:37 am$86.08, Nov 27 5:14 am$19.25, Nov 27 5:14 am$86.36, Nov 29 3:33 am$19.09, Nov 29 3:33 am$85.78, Dec 3 12:19 am$25.26, Dec 3 12:19 am$85.61, Dec 4 10:43 pm$29.41, Dec 4 10:43 pm$85.71, Dec 6 7:52 pm$30.00, Dec 6 - Dec 8$85.63, Dec 9 - Dec 11$38.81, Dec 9 10:54 pm$85.56, Dec 13 11:30 pm$38.78, Dec 13 - Dec 15$85.51, Dec 15 - Dec 17$49.95, Dec 17 12:21 am$85.44, Dec 21 9:10 pm$48.98, Dec 21 9:10 pm$85.46, Jan 3 - Jan 4$67.75, Jan 4 10:26 pm$114.52, Jan 7 - Jan 8$46.37, Jan 7 - Jan 8$114.54, Jan 9 - Jan 13$46.32, Jan 11 5:22 am$114.54, Jan 9 - Jan 13$46.05, Jan 13 7:51 am$114.52, Jan 15 - Jan 22$29.00, Jan 16 6:52 pm$114.52, Jan 15 - Jan 22$29.05, Jan 17 - Jan 20$114.52, Jan 15 - Jan 22$58.65, Jan 21 10:17 pm$114.50, Jan 24 - Jan 27$58.03, Jan 25 6:13 am$114.50, Jan 24 - Jan 27$57.52, Jan 27 1:01 am$114.49, Jan 28 - Jan 29$56.44, Jan 29 3:27 pm$114.48, Jan 31 - Feb 2$49.31, Feb 2 5:22 am$113.04, Feb 5 2:07 am$29.10, Feb 5 2:07 am$108.25, Feb 7 6:55 pm$28.71, Feb 7 6:55 pm$107.98, Feb 9 1:55 pm$28.37, Feb 9 1:55 pm$97.53, Feb 13 4:41 am$28.00, Feb 13 4:41 am$92.42, Feb 15 12:40 am$27.59, Feb 15 - Feb 17$93.21, Feb 18 12:46 am$27.29, Feb 18 11:49 pm$40.20, Feb 21 - Feb 28$27.21, Feb 21 10:47 pm$40.20, Feb 21 - Feb 28$27.15, Feb 24 7:44 pm$40.20, Feb 21 - Feb 28$26.84, Feb 26 6:22 pm$40.20, Feb 21 - Feb 28$26.73, Feb 28 3:55 pm$39.95, Mar 3 - Mar 7$26.41, Mar 5 - Mar 10$40.20, Mar 8 - Mar 9$26.41, Mar 5 - Mar 10$100.94, Mar 10 11:39 am$26.41, Mar 5 - Mar 10$100.40, Mar 13 11:27 pm$26.33, Mar 13 11:27 pm$100.43, Mar 19 - Mar 21$26.23, Mar 19 5:09 am$100.43, Mar 19 - Mar 21$26.24, Mar 21 9:10 am$100.23, Mar 23 - Mar 24$26.27, Mar 23 - Mar 24$94.63, Mar 27 1:37 am$28.43, Mar 27 1:37 am$88.55, Mar 30 3:50 pm$28.99, Mar 30 3:50 pm$87.21, Apr 2 4:01 am$26.61, Apr 2 4:01 am$107.95, Apr 3 - Apr 6$29.02, Apr 4 8:27 pm$107.95, Apr 3 - Apr 6$28.97, Apr 6 4:51 am$107.95, Apr 10 - Apr 22$29.10, Apr 10 - Apr 14$107.95, Apr 10 - Apr 22$37.55, Apr 16 12:14 am$107.95, Apr 10 - Apr 22$44.49, Apr 17 - Apr 18$107.95, Apr 10 - Apr 22$84.30, Apr 21 9:19 am$108.00, Apr 24 4:36 am$79.72, Apr 24 4:36 am$185.88, Apr 25 3:31 pm$51.15, Apr 25 3:31 pm$185.82, Apr 30 3:28 am$69.97, Apr 30 3:28 am$173.95, May 2 8:19 pm$69.22, May 2 8:19 pm$170.43, May 4 5:06 am$98.61, May 4 5:06 am$169.91, May 7 3:19 am$84.56, May 7 3:19 am$208.89, May 9 2:55 am$84.00, May 9 2:55 am$189.27, May 14 1:00 am$79.00, May 12 - May 14$186.65, May 15 6:25 pm$49.45, May 15 6:25 pm$160.91, May 19 8:15 pm$29.10, May 19 8:15 pm$149.60, May 23 11:28 pm$55.29, May 23 - May 28$60.00, May 28 6:45 am$55.29, May 23 - May 28$60.00, May 28 6:45 am$45.27, Jun 1 9:46 pm$60.00, May 28 6:45 am$45.28, Jun 6 - Jun 8$60.00, May 28 6:45 am$45.79, Jun 12 4:26 pm$60.00, May 28 6:45 am$45.72, Jun 16 11:28 am$60.00, May 28 6:45 am$45.71, Jun 18 - Jun 20$160.21, Jun 24 2:22 am$45.73, Jun 24 2:22 am$131.93, Jun 28 2:04 am$40.30, Jun 28 2:04 am$118.43, Jul 2 3:22 am$33.36, Jul 2 3:22 am$101.00, Jul 6 9:53 am$29.70, Jul 6 9:53 am$91.52, Jul 12 1:17 am$48.79, Jul 12 1:17 am$89.88, Jul 14 2:45 am$48.80, Jul 14 - Jul 16$100.71, Jul 17 9:29 pm$29.69, Jul 17 9:29 pm$99.13, Jul 21 1:45 pm$48.65, Jul 21 1:45 pm$98.66, Jul 25 4:07 am$48.54, Jul 25 4:07 am$96.00, Jul 28 5:19 pm$45.75, Jul 28 5:19 pm$94.72, Aug 1 8:07 am$30.00, Aug 1 8:07 am$90.48, Aug 4 11:27 pm$28.20, Aug 4 11:27 pm$87.56, Aug 8 5:11 pm$27.30, Aug 8 5:11 pm$79.41, Aug 12 12:00 pm$26.90, Aug 12 12:00 pm$69.43, Aug 16 6:09 am$26.67, Aug 16 6:09 am$66.11, Aug 18 3:37 am$24.93, Aug 18 3:37 am$54.02, Aug 21 10:01 pm$24.44, Aug 21 10:01 pm$76.17, Aug 25 4:09 pm$19.35, Aug 25 4:09 pm$116.74, Aug 31 8:10 am$39.85, Aug 29 - Aug 31$116.81, Sep 2 - Sep 4$55.28, Sep 2 6:03 am$100.45, Sep 6 - Sep 8$58.57, Sep 6 4:59 am$100.45, Sep 6 - Sep 8$58.99, Sep 8 4:33 am$100.50, Sep 10 4:15 am$84.98, Sep 10 4:15 am$82.19, Sep 12 - Sep 18$65.00, Sep 14 3:07 am$82.19, Sep 12 - Sep 18$55.00, Sep 18 12:09 am$123.66, Sep 21 9:58 pm$54.82, Sep 21 9:58 pm$131.36, Sep 25 8:23 pm$60.21, Sep 25 8:23 pm$132.85, Sep 29 6:49 pm$58.19, Sep 29 6:49 pm$85.00, Oct 3 - Oct 19$45.27, Oct 3 8:23 pm$85.00, Oct 3 - Oct 19$59.99, Oct 7 10:56 pm$85.00, Oct 3 - Oct 19$65.00, Oct 12 - Oct 14$85.00, Oct 3 - Oct 19$49.63, Oct 16 2:12 am$85.00, Oct 3 - Oct 19$46.78, Oct 19 11:13 pm$150.74, Oct 23 8:05 pm$43.99, Oct 23 8:05 pm$143.68, Oct 27 5:51 pm$41.19, Oct 27 5:51 pm$122.85, Oct 31 5:23 pm$49.95, Oct 31 5:23 pm$129.60, Nov 6 7:49 pm$64.95, Nov 6 - Nov 13$144.15, Nov 10 10:26 pm$64.95, Nov 6 - Nov 13$141.63, Nov 13 12:37 am$64.95, Nov 6 - Nov 13$137.52, Nov 17 7:31 am$58.98, Nov 17 7:31 am$132.89, Nov 21 4:16 pm$58.95, Nov 21 4:16 pm$122.66, Nov 26 2:57 am$28.86, Nov 26 2:57 am$105.84, Nov 30 10:32 pm$28.37, Nov 30 10:32 pm$86.65, Dec 5 7:23 pm$40.58, Dec 5 7:23 pm$49.99, Dec 10 10:18 pm$44.95, Dec 10 10:18 pm$49.98, Dec 13 12:23 pm$39.99, Dec 13 12:23 pm$46.00, Dec 18 2:59 pm$40.35, Dec 18 2:59 pm$79.50, Dec 23 - Dec 28$37.70, Dec 23 11:37 am$79.50, Dec 23 - Dec 28$35.85, Dec 28 11:38 am$49.99, Dec 30 7:59 pm$34.98, Dec 30 7:59 pm$67.69, Jan 4 1:19 pm$33.65, Jan 4 1:19 pm$67.68, Jan 7 12:40 am$42.60, Jan 7 12:40 am$67.67, Jan 11 11:11 pm$37.70, Jan 11 11:11 pm$68.02, Jan 14 11:05 am$36.64, Jan 14 11:05 am$71.46, Jan 19 - Jan 22$31.30, Jan 19 11:24 am$71.46, Jan 19 - Jan 22$33.91, Jan 22 12:45 am$71.44, Jan 24 - Jan 27$37.54, Jan 24 1:57 pm$76.42, Jan 29 5:23 pm$36.78, Jan 29 5:23 pm$78.40, Feb 3 6:51 pm$37.28, Feb 3 6:51 pm$79.79, Feb 6 9:18 am$37.15, Feb 6 9:18 am$79.76, Feb 11 - Feb 14$37.53, Feb 11 - Feb 14$79.73, Feb 19 11:54 am$34.69, Feb 19 11:54 am$76.39, Feb 25 12:43 am$12.09, Feb 25 12:43 am$80.16, Mar 5 5:05 pm$10.89, Mar 5 5:05 pm$82.58, Mar 12 4:22 am$19.08, Mar 12 4:22 am$85.59, Mar 18 12:21 am$19.06, Mar 18 12:21 am$86.84, Mar 24 12:40 am$18.98, Mar 24 12:40 am$78.25, Mar 29 9:41 pm$18.39, Mar 29 9:41 pm$71.11, Apr 10 7:11 am$18.98, Apr 10 7:11 am 16,378698,429 562,500 421,875 281,250 140,625 Oct Dec Feb Apr Jun Aug Oct Dec Feb Apr Jun 2015 2016

Price Details

New

Last Seen $44.96 Jan 25, '14
Highest $44.96 Aug 29, '13
Lowest $33.41 Aug 20, '13
Average $44.53 (Overall average)
Added May 12, 2013

3rd Party New

Latest $71.11 85 mins ago
Highest $238.30 May 3, '14
Lowest $39.95 Mar 3, '15
Average $82.37 (30d avg)
$78.09 (90d avg)
$88.34 (180d avg)
$98.24 (365d avg)
$106.29 (Lifetime average)
Added May 12, 2013

3rd Party Used

Latest $18.98 85 mins ago
Highest $121.88 May 27, '14
Lowest $10.89 Mar 5, '16
Average $18.79 (30d avg)
$26.13 (90d avg)
$35.80 (180d avg)
$42.18 (365d avg)
$44.80 (Lifetime average)
Added May 12, 2013

Sales Rank

30 day average: 435,256
90 day average: 325,585

Product Description

The "R+ Book", Fourth Edition: More than a revision An evolution!

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