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Buy from Amazon $17.98$0.01 $20.00 $15.00 $10.00 $5.00 Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul 2013 2014 2015 2016 $17.09, Apr 27 - Aug 9$17.61, Jul 9 - Aug 11$15.09, Aug 20 - Aug 29$17.98, Sep 16 12:44 am$15.10, Nov 19 - Nov 23$14.79, Nov 26 - Dec 5$14.91, Dec 8 - Dec 26$15.03, Dec 29 - Jan 17$14.72, Jan 18 - Feb 6$14.42, Feb 7 - Feb 28$14.13, Mar 1 - Mar 20$13.84, Mar 21 - Apr 5$13.56, Apr 6 - Apr 19$13.28, Apr 20 - May 7$13.28, Apr 20 - May 7$9.98, May 3 - May 19$1.08, May 3 - May 4$13.28, Apr 20 - May 7$9.98, May 3 - May 19$1.28, May 7 3:49 am$13.01, May 8 - May 25$9.98, May 3 - May 19$1.54, May 10 12:32 am$13.01, May 8 - May 25$9.98, May 3 - May 19$1.47, May 12 8:43 am$13.01, May 8 - May 25$9.98, May 3 - May 19$1.41, May 14 2:21 pm$13.01, May 8 - May 25$9.98, May 3 - May 19$1.39, May 18 - May 19$13.01, May 8 - May 25$5.47, May 21 - May 27$1.45, May 21 6:32 am$13.01, May 8 - May 25$5.47, May 21 - May 27$1.49, May 22 - May 26$12.74, May 26 - Jun 14$5.47, May 21 - May 27$1.49, May 22 - 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Jul 20$9.99, Jun 28 - Jul 20$2.51, Jul 10 11:43 pm$12.35, Jun 27 - Jul 20$9.99, Jun 28 - Jul 20$2.27, Jul 14 7:53 pm$12.35, Jun 27 - Jul 20$9.99, Jun 28 - Jul 20$2.11, Jul 17 1:20 pm$12.35, Jun 27 - Jul 20$9.99, Jun 28 - Jul 20$1.96, Jul 20 12:02 am$12.56, Jul 21 - Jul 29$7.98, Jul 23 - Aug 13$1.83, Jul 23 4:42 am$12.56, Jul 21 - Jul 29$7.98, Jul 23 - Aug 13$1.68, Jul 25 9:41 pm$12.56, Jul 21 - Jul 29$7.98, Jul 23 - Aug 13$1.48, Jul 28 2:00 pm$12.77, Jul 30 - Aug 2$7.98, Jul 23 - Aug 13$1.21, Aug 1 4:59 am$12.93, Aug 3 - Aug 7$7.98, Jul 23 - Aug 13$1.06, Aug 3 9:40 pm$12.93, Aug 3 - Aug 7$7.98, Jul 23 - Aug 13$0.89, Aug 6 11:08 pm$12.67, Aug 9 - Aug 12$7.98, Jul 23 - Aug 13$0.80, Aug 9 12:45 am$12.67, Aug 9 - Aug 12$7.98, Jul 23 - Aug 13$0.48, Aug 11 10:48 pm$12.83, Aug 13 - Aug 17$7.84, Aug 14 8:00 pm$0.24, Aug 14 8:00 pm$12.78, Aug 18 - Aug 22$7.24, Aug 18 4:24 am$0.19, Aug 18 4:24 am$12.78, Aug 18 - Aug 22$6.89, Aug 20 11:20 am$0.16, Aug 20 11:20 am$12.52, Aug 23 - Aug 26$6.69, Aug 23 2:55 pm$0.15, Aug 23 2:55 pm$12.52, Aug 23 - Aug 26$6.49, Aug 26 6:30 pm$0.01, Aug 24 - Aug 28$12.56, Aug 28 - Sep 5$6.41, Aug 29 4:23 am$0.06, Aug 29 4:23 am$12.56, Aug 28 - Sep 5$6.24, Sep 1 3:58 pm$0.30, Sep 1 3:58 pm$12.56, Aug 28 - Sep 5$6.02, Sep 4 1:48 am$0.33, Sep 4 1:48 am$12.77, Sep 6 - Sep 14$5.87, Sep 6 10:50 am$0.21, Sep 6 10:50 am$12.77, Sep 6 - Sep 14$5.77, Sep 8 - Sep 11$0.05, Sep 10 1:16 am$12.77, Sep 6 - Sep 14$6.86, Sep 12 - Sep 22$0.01, Sep 11 - Sep 14$12.93, Sep 15 - Sep 20$6.86, Sep 12 - Sep 22$1.41, Sep 15 4:56 pm$12.93, Sep 15 - Sep 20$6.86, Sep 12 - Sep 22$2.35, Sep 18 9:58 pm$13.09, Sep 21 - Sep 25$6.86, Sep 12 - Sep 22$2.28, Sep 21 2:04 pm$13.09, Sep 21 - Sep 25$6.86, Sep 12 - Sep 22$2.25, Sep 22 6:25 pm$13.24, Sep 26 - Sep 29$6.52, Sep 27 - Sep 29$1.96, Sep 26 - Sep 27$12.97, Sep 30 - Oct 4$6.45, Sep 30 9:19 am$1.54, Sep 30 9:19 am$12.97, Sep 30 - Oct 4$6.37, Oct 1 - Oct 2$1.40, Oct 2 2:21 pm$12.71, Oct 5 - Oct 9$6.85, Oct 4 - Oct 5$1.20, Oct 5 8:42 pm$12.71, Oct 5 - Oct 9$6.59, Oct 8 1:13 am$1.16, Oct 8 1:13 am$12.45, Oct 10 - 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Jan 20$3.21, Jan 13 - Jan 23$0.71, Jan 20 3:45 am$15.59, Jan 20 - Jan 24$3.21, Jan 13 - Jan 23$0.66, Jan 22 3:38 pm$15.74, Jan 25 - Jan 29$3.20, Jan 24 - Jan 31$0.53, Jan 25 4:24 am$15.74, Jan 25 - Jan 29$3.20, Jan 24 - Jan 31$0.66, Jan 28 - Jan 30$15.89, Jan 30 - Feb 2$3.20, Jan 24 - Jan 31$0.61, Jan 31 9:17 am$16.04, Feb 3 - Feb 6$3.21, Feb 2 - Feb 5$0.50, Feb 3 - Feb 9$16.19, Feb 7 - Feb 12$5.41, Feb 6 - Feb 9$0.50, Feb 3 - Feb 9$16.19, Feb 7 - Feb 12$5.35, Feb 10 - Feb 22$0.78, Feb 10 - Feb 12$16.35, Feb 13 - Feb 16$5.35, Feb 10 - Feb 22$1.95, Feb 13 - Feb 14$16.51, Feb 17 - Feb 21$5.35, Feb 10 - Feb 22$1.96, Feb 17 - Mar 4$16.55, Feb 22 - Feb 25$5.35, Feb 10 - Feb 22$1.96, Feb 17 - Mar 4$16.38, Feb 26 - Mar 1$8.84, Feb 26 - Mar 2$1.96, Feb 17 - Mar 4$16.21, Mar 2 - Mar 6$8.99, Mar 3 - Mar 4$1.96, Feb 17 - Mar 4$16.21, Mar 2 - Mar 6$8.79, Mar 6 7:19 pm$0.44, Mar 6 7:19 pm$16.15, Mar 7 - Apr 7$8.39, Mar 9 11:47 pm$0.39, Mar 9 11:47 pm$16.15, Mar 7 - Apr 7$8.04, Mar 12 7:59 am$0.34, Mar 12 7:59 am$16.15, Mar 7 - Apr 7$7.71, Mar 14 4:09 pm$0.31, Mar 14 4:09 pm$16.15, Mar 7 - Apr 7$6.45, Mar 18 3:19 pm$0.26, Mar 16 - Mar 18$16.15, Mar 7 - Apr 7$5.26, Mar 20 11:34 pm$0.25, Mar 19 - Mar 20$16.15, Mar 7 - Apr 7$4.57, Mar 23 8:26 am$0.24, Mar 22 - Mar 24$16.15, Mar 7 - Apr 7$4.39, Mar 26 - Mar 28$0.23, Mar 25 - Mar 26$16.15, Mar 7 - Apr 7$4.29, Mar 29 - Mar 30$0.18, Mar 29 6:21 am$16.15, Mar 7 - Apr 7$3.94, Apr 2 - Apr 3$0.08, Apr 2 12:38 am$16.15, Mar 7 - Apr 7$3.64, Apr 4 4:54 pm$0.01, Apr 4 - Apr 10$16.15, Mar 7 - Apr 7$3.29, Apr 7 9:57 am$0.01, Apr 4 - Apr 10$15.98, Apr 8 - Apr 15$3.00, Apr 10 - Apr 15$0.01, Apr 4 - Apr 10$15.98, Apr 8 - Apr 15$3.00, Apr 10 - Apr 15$0.17, Apr 11 - Apr 13$15.98, Apr 8 - Apr 15$3.00, Apr 10 - Apr 15$0.16, Apr 14 - Apr 18$15.81, Apr 18 10:49 am$8.99, Apr 18 - Apr 25$0.16, Apr 14 - Apr 18$15.75, Apr 21 - Apr 23$8.99, Apr 18 - Apr 25$0.14, Apr 21 3:39 am$15.75, Apr 21 - Apr 23$8.99, Apr 18 - Apr 25$2.21, Apr 23 - Apr 25$16.01, Apr 27 - May 1$8.99, Apr 27 - Apr 30$2.21, Apr 27 - Apr 28$16.01, Apr 27 - May 1$8.99, Apr 27 - Apr 30$2.13, Apr 30 12:20 am$16.01, Apr 27 - May 1$5.48, May 1 - May 6$2.05, May 1 10:17 am$15.85, May 4 - May 6$5.48, May 1 - May 6$1.89, May 5 11:54 am$15.69, May 8 - May 12$8.99, May 8 9:17 pm$1.48, May 8 9:17 pm$15.69, May 8 - May 12$8.96, May 12 4:44 am$1.11, May 12 4:44 am$15.53, May 13 - May 21$8.89, May 13 8:18 pm$1.03, May 13 8:18 pm$15.53, May 13 - May 21$8.29, May 17 11:24 am$1.87, May 17 - May 19$15.53, May 13 - May 21$7.75, May 19 3:12 pm$1.87, May 17 - May 19$15.53, May 13 - May 21$7.20, May 21 9:47 pm$1.76, May 21 9:47 pm$15.37, May 24 - Jun 2$4.91, May 26 2:24 am$1.64, May 26 2:24 am$15.37, May 24 - Jun 2$4.38, May 28 7:44 am$0.01, May 28 7:44 am$15.37, May 24 - Jun 2$3.81, May 30 3:32 pm$2.19, May 30 3:32 pm$15.37, May 24 - Jun 2$3.54, Jun 2 12:09 am$2.13, Jun 2 12:09 am$15.21, Jun 4 - Jun 6$3.98, Jun 6 - Jun 20$1.83, Jun 6 5:31 pm$15.05, Jun 8 - Jun 20$3.98, Jun 6 - Jun 20$1.70, Jun 8 11:04 pm$15.05, Jun 8 - Jun 20$3.98, Jun 6 - Jun 20$1.61, Jun 11 1:38 am$15.05, Jun 8 - Jun 20$3.98, Jun 6 - Jun 20$1.20, Jun 14 8:47 pm$15.05, Jun 8 - Jun 20$3.98, Jun 6 - Jun 20$0.95, Jun 16 6:28 pm$15.05, Jun 8 - Jun 20$3.98, Jun 6 - Jun 20$0.50, Jun 20 1:45 pm$14.89, Jun 22 - Jul 20$3.77, Jun 22 11:37 am$0.22, Jun 22 11:37 am$14.89, Jun 22 - Jul 20$5.38, Jun 26 8:25 am$0.18, Jun 26 - Jul 6$14.89, Jun 22 - Jul 20$4.85, Jun 28 10:27 am$0.18, Jun 26 - Jul 6$14.89, Jun 22 - Jul 20$3.84, Jul 2 2:49 pm$0.18, Jun 26 - Jul 6$14.89, Jun 22 - Jul 20$3.41, Jul 4 5:45 pm$0.18, Jun 26 - Jul 6$14.89, Jun 22 - Jul 20$5.96, Jul 6 10:36 pm$0.18, Jun 26 - Jul 6$14.89, Jun 22 - Jul 20$5.91, Jul 9 6:24 pm$0.14, Jul 9 6:24 pm$14.89, Jun 22 - Jul 20$5.93, Jul 13 11:35 am$0.17, Jul 12 - Jul 13$14.89, Jun 22 - Jul 20$5.89, Jul 15 8:29 am$2.15, Jul 15 - Jul 17$14.89, Jun 22 - Jul 20$5.91, Jul 19 2:22 am$2.16, Jul 19 - Jul 22$15.16, Jul 22 - Jul 30$5.94, Jul 22 8:15 pm$2.16, Jul 19 - Jul 22$15.16, Jul 22 - Jul 30$5.90, Jul 24 4:15 pm$2.09, Jul 24 4:15 pm$15.16, Jul 22 - Jul 30$5.48, Jul 28 7:11 am$1.43, Jul 28 7:11 am$15.16, Jul 22 - Jul 30$4.91, Jul 30 2:26 am$1.17, Jul 30 2:26 am$15.00, Jul 31 - Aug 8$4.85, Aug 2 6:45 pm$0.88, Aug 2 6:45 pm$15.00, Jul 31 - Aug 8$3.98, Aug 4 - Aug 8$0.99, Aug 4 2:29 pm$15.00, Jul 31 - Aug 8$3.98, Aug 4 - Aug 8$0.91, Aug 8 8:44 am$14.84, Aug 12 - Aug 25$3.98, Aug 14 2:38 am$0.88, Aug 12 - Aug 16$14.84, Aug 12 - Aug 25$2.98, Aug 16 - Aug 21$0.88, Aug 12 - Aug 16$14.84, Aug 12 - Aug 25$2.98, Aug 16 - Aug 21$0.01, Aug 17 - Aug 23$14.84, Aug 12 - Aug 25$0.99, Aug 25 - Aug 31$0.18, Aug 25 1:41 pm$14.69, Aug 27 - Sep 12$0.99, Aug 25 - Aug 31$0.49, Aug 27 12:10 pm$14.69, Aug 27 - Sep 12$0.99, Aug 25 - Aug 31$0.55, Aug 31 7:42 am$14.69, Aug 27 - Sep 12$5.42, Sep 4 - Sep 6$0.60, Sep 6 4:04 am$14.69, Aug 27 - Sep 12$5.41, Sep 10 - Sep 12$0.53, Sep 12 1:35 am$14.54, Sep 15 - Sep 21$5.72, Sep 15 - Sep 21$0.01, Sep 15 - Sep 27$14.39, Sep 23 - Oct 1$5.69, Sep 23 7:20 pm$0.01, Sep 15 - Sep 27$14.39, Sep 23 - Oct 1$5.61, Sep 25 - Sep 27$0.01, Sep 15 - Sep 27$14.39, Sep 23 - Oct 1$5.62, Sep 29 - Oct 3$0.39, Sep 29 - Oct 1$14.24, Oct 3 - Oct 5$5.62, Sep 29 - Oct 3$0.01, Oct 3 9:32 pm$14.51, Oct 8 - Oct 16$5.72, Oct 5 - Oct 8$0.39, Oct 5 - Oct 8$14.51, Oct 8 - Oct 16$5.99, Oct 10 4:40 am$0.01, Oct 10 - Oct 16$14.51, Oct 8 - Oct 16$4.95, Oct 14 - Oct 16$0.01, Oct 10 - Oct 16$14.78, Oct 18 - Oct 20$5.90, Oct 18 4:23 am$0.39, Oct 18 - Oct 20$15.05, Oct 22 - Oct 24$4.94, Oct 22 - Oct 26$0.11, Oct 22 2:31 am$15.05, Oct 22 - Oct 24$4.94, Oct 22 - Oct 26$0.49, Oct 24 - Oct 26$14.63, Oct 26 - Oct 28$3.94, Oct 28 - Nov 1$0.81, Oct 28 12:57 am$14.48, Oct 30 - Nov 3$3.94, Oct 28 - Nov 1$1.21, Oct 30 1:18 am$14.48, Oct 30 - Nov 3$5.99, Nov 3 2:12 am$1.25, Nov 3 2:12 am$14.33, Nov 5 - Nov 9$4.99, Nov 5 3:47 am$1.34, Nov 5 3:47 am$14.33, Nov 5 - Nov 9$4.98, Nov 7 - Nov 9$1.46, Nov 7 6:11 am$14.33, Nov 5 - Nov 9$4.98, Nov 7 - Nov 9$1.45, Nov 9 8:11 am$14.18, Nov 13 - Nov 19$3.44, Nov 13 10:52 am$1.40, Nov 13 10:52 am$14.18, Nov 13 - Nov 19$3.17, Nov 15 1:44 pm$1.34, Nov 15 1:44 pm$14.18, Nov 13 - Nov 19$1.98, Nov 19 11:23 pm$1.11, Nov 19 11:23 pm$14.60, Nov 24 9:34 am$2.11, Nov 24 9:34 am$0.53, Nov 24 9:34 am$14.87, Nov 26 - Dec 8$1.98, Nov 26 - Dec 1$0.50, Nov 26 4:02 pm$14.87, Nov 26 - Dec 8$1.98, Nov 26 - Dec 1$0.14, Dec 1 12:36 pm$14.87, Nov 26 - Dec 8$4.44, Dec 6 9:50 am$0.01, Dec 6 9:50 am$14.87, Nov 26 - Dec 8$4.32, Dec 8 9:52 pm$0.38, Dec 8 9:52 pm$15.14, Dec 11 - Dec 19$4.19, Dec 11 12:29 pm$0.07, Dec 11 12:29 pm$15.14, Dec 11 - Dec 19$4.27, Dec 14 2:39 am$0.02, Dec 14 2:39 am$15.40, Dec 21 - Dec 24$4.36, Dec 21 4:20 pm$0.39, Dec 19 - Dec 21$15.40, Dec 21 - Dec 24$4.09, Dec 24 3:04 am$0.45, Dec 24 3:04 am$15.66, Dec 26 - Jan 3$3.20, Dec 26 10:34 pm$0.40, Dec 26 10:34 pm$15.66, Dec 26 - Jan 3$2.42, Dec 29 12:18 pm$1.99, Dec 29 12:18 pm$15.66, Dec 26 - Jan 3$4.25, Dec 31 9:23 pm$2.91, Dec 31 9:23 pm$15.66, Dec 26 - Jan 3$4.67, Jan 3 7:48 am$1.99, Jan 3 7:48 am$15.50, Jan 5 - Jan 10$4.69, Jan 5 5:59 pm$2.96, Jan 5 5:59 pm$15.50, Jan 5 - Jan 10$4.69, Jan 10 5:35 pm$1.94, Jan 10 5:35 pm$15.34, Jan 13 - Jan 25$4.67, Jan 13 - Jan 15$2.00, Jan 13 5:27 am$15.34, Jan 13 - Jan 25$4.67, Jan 13 - Jan 15$0.53, Jan 15 5:56 pm$15.34, Jan 13 - Jan 25$4.69, Jan 20 - Jan 25$1.97, Jan 20 6:00 pm$15.34, Jan 13 - Jan 25$4.69, Jan 20 - Jan 25$2.00, Jan 23 - Jan 25$15.18, Jan 28 - Jan 30$4.59, Jan 30 11:22 pm$1.93, Jan 30 11:22 pm$15.02, Feb 2 - Feb 5$4.50, Feb 2 11:59 am$1.85, Feb 2 11:59 am$15.02, Feb 2 - Feb 5$4.40, Feb 5 2:35 am$1.44, Feb 5 2:35 am$14.87, Feb 10 4:02 am$4.16, Feb 10 4:02 am$0.39, Feb 10 4:02 am$14.72, Feb 15 - Feb 26$4.06, Feb 15 12:28 pm$0.01, Feb 15 - Feb 23$14.72, Feb 15 - Feb 26$3.99, Feb 18 6:04 am$0.01, Feb 15 - Feb 23$14.72, Feb 15 - Feb 26$3.65, Feb 20 11:31 pm$0.01, Feb 15 - Feb 23$14.72, Feb 15 - Feb 26$3.54, Feb 23 7:44 pm$0.01, Feb 15 - Feb 23$14.72, Feb 15 - Feb 26$2.93, Feb 26 2:08 pm$0.06, Feb 26 2:08 pm$14.57, Feb 29 10:13 am$2.73, Feb 29 10:13 am$0.07, Feb 29 10:13 am$14.42, Mar 5 6:39 am$1.99, Mar 5 6:39 am$0.09, Mar 5 6:39 am$14.84, Mar 11 4:33 pm$3.29, Mar 11 4:33 pm$0.01, Mar 11 - Mar 17$15.11, Mar 17 12:36 pm$3.10, Mar 17 12:36 pm$0.01, Mar 11 - Mar 17$14.69, Mar 23 12:37 pm$3.00, Mar 23 12:37 pm$0.09, Mar 23 12:37 pm$14.54, Mar 29 8:39 am$8.67, Mar 29 8:39 am$0.01, Mar 29 - Apr 10$14.39, Apr 4 5:00 am$8.95, Apr 4 - Apr 10$0.01, Mar 29 - Apr 10$14.24, Apr 10 12:26 am$8.95, Apr 4 - Apr 10$0.01, Mar 29 - Apr 10$14.51, Apr 21 8:44 pm$8.10, Apr 21 8:44 pm$0.09, Apr 21 8:44 pm 27,269364,224 390,625 312,500 234,375 156,250 78,125 0 Oct Dec Feb Apr Jun Aug Oct Dec Feb Apr Jun 2015 2016

Price Details

New

Latest $14.51 15 hrs ago
Highest $17.98 Sep 16, '13
Lowest $12.35 Oct 14, '14
Average $14.42 (30d avg)
$14.73 (90d avg)
$14.83 (180d avg)
$14.92 (365d avg)
$14.95 (Lifetime average)
Added Apr 27, 2013

3rd Party New

Latest $8.10 15 hrs ago
Highest $9.99 Jun 28, '14
Lowest $0.99 Aug 25, '15
Average $7.71 (30d avg)
$4.96 (90d avg)
$4.40 (180d avg)
$4.77 (365d avg)
$5.41 (Lifetime average)
Added Apr 27, 2013

3rd Party Used

Latest $0.09 15 hrs ago
Highest $2.96 Jan 5, '16
Lowest $0.01 Mar 29, '16
Average $0.03 (30d avg)
$0.41 (90d avg)
$0.70 (180d avg)
$0.79 (365d avg)
$0.82 (Lifetime average)
Added Apr 27, 2013

Sales Rank

30 day average: 173,140
90 day average: 156,434

Product Description

Today man's mind is under attack by all the leading schools of philosophy. We are told that we cannot trust our senses, that logic is arbitrary, that concepts have no basis in reality. Ayn Rand opposes that torrent of nihilism, and she provides the alternative in this eloquent presentation of the essential nature--and power--of man's conceptual faculty. She offers a startlingly original solution to the problem that brought about the collapse of modern philosophy: the problem of universals. This brilliantly argued, superbly written work, together with an essay by philosophy professor Leonard Peikoff, is vital reading for all those who seek to discover that human beings can and should live by the guidance of reason.

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