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2016
$26.18, Oct 8 12:43 am $24.87, Nov 20 9:09 pm $24.62, Nov 24 - Dec 1 $24.37, Dec 3 - Dec 10 $24.12, Dec 13 - Dec 17 $23.87, Dec 19 - Dec 22 $23.75, Dec 25 - Dec 29 $23.63, Dec 31 - Jan 4 $23.51, Jan 5 - Jan 7 $23.39, Jan 8 - Jan 13 $23.27, Jan 13 - Jan 17 $23.15, Jan 17 - Jan 21 $23.03, Jan 22 - Jan 25 $22.91, Jan 25 - Feb 1 $22.79, Feb 2 - Feb 5 $22.68, Feb 6 - Jul 27 $22.68, May 3 - Jul 27 $22.68, Feb 6 - Jul 27 $17.99, May 3 - May 5 $22.68, May 3 - Jul 27 $22.68, Feb 6 - Jul 27 $17.25, May 6 - May 12 $22.68, May 3 - Jul 27 $22.68, Feb 6 - Jul 27 $16.73, May 12 - May 14 $22.68, May 3 - Jul 27 $22.68, Feb 6 - Jul 27 $16.23, May 15 11:31 pm $22.68, May 3 - Jul 27 $22.68, Feb 6 - Jul 27 $16.19, May 18 9:26 am $22.68, May 3 - Jul 27 $22.68, Feb 6 - Jul 27 $15.65, May 21 6:26 am $22.68, May 3 - Jul 27 $22.68, Feb 6 - Jul 27 $15.14, May 23 4:16 pm $22.68, May 3 - Jul 27 $22.68, Feb 6 - Jul 27 $14.65, May 26 7:12 am $22.68, May 3 - Jul 27 $22.68, Feb 6 - Jul 27 $14.17, May 28 6:07 pm $22.68, May 3 - Jul 27 $22.68, Feb 6 - Jul 27 $13.71, May 31 7:40 am $22.68, May 3 - Jul 27 $22.68, Feb 6 - Jul 27 $13.67, Jun 2 6:50 am $22.68, May 3 - Jul 27 $22.68, Feb 6 - Jul 27 $13.24, Jun 3 - Jun 4 $22.68, May 3 - Jul 27 $22.68, Feb 6 - Jul 27 $12.81, Jun 7 10:27 am $22.68, May 3 - Jul 27 $22.68, Feb 6 - Jul 27 $12.39, Jun 9 2:44 pm $22.68, May 3 - Jul 27 $22.68, Feb 6 - Jul 27 $11.94, Jun 12 2:34 pm $22.68, May 3 - Jul 27 $22.68, Feb 6 - Jul 27 $11.88, Jun 15 12:35 am $22.68, May 3 - Jul 27 $22.68, Feb 6 - Jul 27 $11.51, Jun 15 - Jun 17 $22.68, May 3 - Jul 27 $22.68, Feb 6 - Jul 27 $11.15, Jun 18 - Jun 20 $22.68, May 3 - Jul 27 $22.68, Feb 6 - Jul 27 $10.82, Jun 21 - Jun 23 $22.68, May 3 - Jul 27 $22.68, Feb 6 - Jul 27 $10.50, Jun 24 - Jun 26 $22.68, May 3 - Jul 27 $22.68, Feb 6 - Jul 27 $10.18, Jun 27 - Jun 29 $22.68, May 3 - Jul 27 $22.68, Feb 6 - Jul 27 $9.87, Jun 30 - Jul 2 $22.68, May 3 - Jul 27 $22.68, Feb 6 - Jul 27 $9.57, Jul 4 - Jul 5 $22.68, May 3 - Jul 27 $22.68, Feb 6 - Jul 27 $9.28, Jul 6 - Jul 9 $22.68, May 3 - Jul 27 $22.68, Feb 6 - Jul 27 $9.00, Jul 10 - Jul 11 $22.68, May 3 - Jul 27 $22.68, Feb 6 - Jul 27 $8.73, Jul 12 - Jul 14 $22.68, May 3 - Jul 27 $22.68, Feb 6 - Jul 27 $8.47, Jul 15 - Jul 17 $22.68, May 3 - Jul 27 $22.68, Feb 6 - Jul 27 $8.44, Jul 18 7:05 am $22.68, May 3 - Jul 27 $22.68, Feb 6 - Jul 27 $8.12, Jul 20 - Jul 21 $22.68, May 3 - Jul 27 $22.68, Feb 6 - Jul 27 $7.84, Jul 23 4:36 pm $22.68, May 3 - Jul 27 $22.68, Feb 6 - Jul 27 $7.75, Jul 26 8:17 am $22.45, Jul 28 - Aug 8 $22.45, Jul 28 - Aug 8 $7.44, Jul 28 3:14 am $22.45, Jul 28 - Aug 8 $22.45, Jul 28 - Aug 8 $7.14, Jul 30 7:51 pm $22.45, Jul 28 - Aug 8 $22.45, Jul 28 - Aug 8 $6.88, Aug 2 12:56 pm $22.45, Jul 28 - Aug 8 $22.45, Jul 28 - Aug 8 $6.42, Aug 5 - Aug 7 $22.22, Aug 9 - Aug 17 $22.22, Aug 9 - Aug 17 $6.23, Aug 8 - Aug 11 $22.22, Aug 9 - Aug 17 $22.22, Aug 9 - Aug 17 $6.42, Aug 12 - Aug 14 $22.22, Aug 9 - Aug 17 $22.22, Aug 9 - Aug 17 $7.80, Aug 16 - Aug 17 $22.21, Aug 18 - Aug 31 $22.21, Aug 18 - Aug 31 $7.81, Aug 19 3:17 pm $22.21, Aug 18 - Aug 31 $22.21, Aug 18 - Aug 31 $10.81, Aug 20 - Aug 23 $22.21, Aug 18 - Aug 31 $22.21, Aug 18 - Aug 31 $10.88, Aug 24 5:53 pm $22.21, Aug 18 - Aug 31 $22.21, Aug 18 - Aug 31 $10.86, Aug 26 8:11 pm $22.21, Aug 18 - Aug 31 $22.21, Aug 18 - Aug 31 $11.22, Aug 28 - Aug 29 $22.21, Aug 18 - Aug 31 $22.21, Aug 18 - Aug 31 $7.13, Aug 30 - Sep 1 $22.43, Sep 1 - Sep 7 $22.43, Sep 1 - Sep 7 $6.80, Sep 2 - Sep 4 $22.43, Sep 1 - Sep 7 $22.43, Sep 1 - Sep 7 $10.98, Sep 5 7:31 am $22.43, Sep 1 - Sep 7 $22.43, Sep 1 - Sep 7 $11.22, Sep 7 - Sep 13 $22.20, Sep 8 - Sep 15 $22.20, Sep 8 - Sep 15 $11.22, Sep 7 - Sep 13 $22.20, Sep 8 - Sep 15 $22.20, Sep 8 - Sep 15 $11.74, Sep 15 - Sep 17 $21.97, Sep 17 - Sep 24 $21.97, Sep 17 - Sep 24 $11.74, Sep 15 - Sep 17 $21.97, Sep 17 - Sep 24 $21.97, Sep 17 - Sep 24 $11.71, Sep 19 9:48 pm $21.97, Sep 17 - Sep 24 $21.97, Sep 17 - Sep 24 $11.64, Sep 22 1:19 pm $21.97, Sep 17 - Sep 24 $21.97, Sep 17 - Sep 24 $11.60, Sep 24 1:42 pm $21.75, Sep 25 - Oct 22 $21.75, Sep 25 - Dec 26 $11.51, Sep 27 5:28 pm $21.75, Sep 25 - Oct 22 $21.75, Sep 25 - Dec 26 $11.50, Sep 29 5:30 pm $21.75, Sep 25 - Oct 22 $21.75, Sep 25 - Dec 26 $11.48, Sep 30 10:44 pm $21.75, Sep 25 - Oct 22 $21.75, Sep 25 - Dec 26 $11.40, Oct 5 3:58 am $21.75, Sep 25 - Oct 22 $21.75, Sep 25 - Dec 26 $11.35, Oct 7 6:31 am $21.75, Sep 25 - Oct 22 $21.75, Sep 25 - Dec 26 $11.26, Oct 9 8:48 am $21.75, Sep 25 - Oct 22 $21.75, Sep 25 - Dec 26 $11.23, Oct 11 3:23 pm $21.75, Sep 25 - Oct 22 $21.75, Sep 25 - Dec 26 $11.22, Oct 13 - Oct 22 $21.75, Sep 25 - Dec 26 $21.73, Oct 27 7:07 am $8.27, Oct 27 7:07 am $21.75, Sep 25 - Dec 26 $21.68, Nov 1 12:54 pm $8.39, Nov 1 - Nov 23 $21.75, Sep 25 - Dec 26 $21.67, Nov 4 - Nov 7 $8.39, Nov 1 - Nov 23 $21.75, Sep 25 - Dec 26 $21.66, Nov 13 - Nov 17 $8.39, Nov 1 - Nov 23 $21.75, Sep 25 - Dec 26 $21.65, Nov 19 9:25 pm $8.39, Nov 1 - Nov 23 $21.75, Sep 25 - Dec 26 $21.64, Nov 21 11:17 pm $8.39, Nov 1 - Nov 23 $21.75, Sep 25 - Dec 26 $21.63, Nov 23 - Nov 26 $8.39, Nov 1 - Nov 23 $21.75, Sep 25 - Dec 26 $21.62, Nov 27 9:29 pm $8.37, Nov 26 - Dec 1 $21.75, Sep 25 - Dec 26 $17.40, Nov 29 - Dec 7 $8.37, Nov 26 - Dec 1 $21.75, Sep 25 - Dec 26 $17.40, Nov 29 - Dec 7 $8.40, Dec 3 4:30 pm $21.75, Sep 25 - Dec 26 $17.40, Nov 29 - Dec 7 $8.39, Dec 5 - Dec 7 $21.75, Sep 25 - Dec 26 $21.59, Dec 9 1:15 pm $8.37, Dec 9 1:15 pm $21.75, Sep 25 - Dec 26 $21.56, Dec 11 2:31 pm $8.19, Dec 11 2:31 pm $21.75, Sep 25 - Dec 26 $21.54, Dec 13 11:39 am $8.05, Dec 13 11:39 am $21.75, Sep 25 - Dec 26 $21.52, Dec 17 9:31 am $7.55, Dec 17 9:31 am $21.75, Sep 25 - Dec 26 $21.50, Dec 22 - Dec 23 $8.39, Dec 22 - Dec 26 $21.75, Sep 25 - Dec 26 $21.49, Dec 24 12:44 am $8.39, Dec 22 - Dec 26 $21.63, Dec 27 - Jan 1 $21.45, Dec 27 5:00 am $12.43, Dec 27 5:00 am $21.63, Dec 27 - Jan 1 $21.43, Dec 29 1:15 am $14.99, Dec 29 - Jan 1 $21.63, Dec 30 - Jan 1 $21.63, Dec 27 - Jan 1 $14.99, Dec 29 - Jan 1 $21.52, Jan 2 3:30 am $21.52, Jan 2 3:30 am $15.00, Jan 2 - Jan 14 $21.41, Jan 9 - Jan 14 $21.41, Jan 9 - Jan 14 $15.00, Jan 2 - Jan 14 $21.30, Jan 15 - Jan 20 $21.30, Jan 15 - Jan 20 $14.99, Jan 15 5:52 am $21.30, Jan 15 - Jan 20 $21.30, Jan 15 - Jan 20 $17.10, Jan 20 10:53 am $21.19, Jan 22 - Jan 28 $21.19, Jan 22 - Jan 28 $16.98, Jan 22 10:16 pm $21.19, Jan 22 - Jan 28 $21.19, Jan 22 - Jan 28 $16.97, Jan 25 10:39 am $21.19, Jan 22 - Jan 28 $21.19, Jan 22 - Jan 28 $16.96, Jan 26 7:37 am $21.08, Jan 28 - Feb 4 $21.08, Jan 28 - Feb 2 $17.07, Jan 28 - Jan 29 $21.08, Jan 28 - Feb 4 $21.08, Jan 28 - Feb 2 $17.03, Feb 1 2:38 pm $21.08, Jan 28 - Feb 4 $21.08, Jan 28 - Feb 2 $17.01, Feb 2 12:48 pm $21.60, Feb 5 - Feb 8 $21.60, Feb 4 - Mar 18 $16.90, Feb 5 - Feb 8 $21.60, Feb 4 - Mar 18 $21.59, Feb 10 3:11 pm $15.57, Feb 10 3:11 pm $21.60, Feb 4 - Mar 18 $17.00, Feb 12 - Mar 3 $15.42, Feb 12 10:28 am $21.60, Feb 4 - Mar 18 $17.00, Feb 12 - Mar 3 $14.75, Feb 16 2:26 am $21.60, Feb 4 - Mar 18 $17.00, Feb 12 - Mar 3 $14.60, Feb 18 12:23 am $21.60, Feb 4 - Mar 18 $17.00, Feb 12 - Mar 3 $14.53, Feb 19 10:02 pm $21.60, Feb 4 - Mar 18 $17.00, Feb 12 - Mar 3 $14.25, Feb 23 5:53 pm $21.60, Feb 4 - Mar 18 $17.00, Feb 12 - Mar 3 $14.17, Feb 25 3:43 pm $21.60, Feb 4 - Mar 18 $17.00, Feb 12 - Mar 3 $14.06, Feb 27 1:53 pm $21.60, Feb 4 - Mar 18 $17.00, Feb 12 - Mar 3 $13.81, Mar 1 12:36 pm $21.60, Mar 4 - Mar 15 $21.60, Feb 4 - Mar 18 $13.45, Mar 4 3:08 pm $21.60, Mar 4 - Mar 15 $21.60, Feb 4 - Mar 18 $13.07, Mar 6 3:23 pm $21.60, Mar 4 - Mar 15 $21.60, Feb 4 - Mar 18 $12.44, Mar 8 2:39 pm $21.60, Mar 4 - Mar 15 $21.60, Feb 4 - Mar 18 $12.01, Mar 10 9:37 pm $21.60, Mar 4 - Mar 15 $21.60, Feb 4 - Mar 18 $11.71, Mar 13 3:42 am $21.60, Mar 4 - Mar 15 $21.60, Feb 4 - Mar 18 $11.51, Mar 15 10:46 am $21.60, Mar 4 - Mar 15 $21.60, Feb 4 - Mar 18 $11.44, Mar 18 12:15 am $21.60, Mar 4 - Mar 15 $20.86, Mar 20 - Apr 2 $11.23, Mar 20 7:28 am $21.60, Mar 4 - Mar 15 $20.86, Mar 20 - Apr 2 $11.22, Mar 25 - Mar 29 $21.60, Mar 4 - Mar 15 $20.86, Mar 20 - Apr 2 $11.23, Mar 30 10:43 pm $21.60, Mar 4 - Mar 15 $20.86, Mar 20 - Apr 2 $12.95, Apr 2 - Apr 25 $21.60, Mar 4 - Mar 15 $20.65, Apr 5 - Apr 9 $12.95, Apr 2 - Apr 25 $21.60, Mar 4 - Mar 15 $20.44, Apr 10 - Apr 16 $12.95, Apr 2 - Apr 25 $21.60, Mar 4 - Mar 15 $20.23, Apr 18 - Apr 22 $12.95, Apr 2 - Apr 25 $21.60, Mar 4 - Mar 15 $20.02, Apr 28 4:20 pm $12.95, Apr 28 4:20 pm $21.60, Mar 4 - Mar 15 $19.81, May 1 - May 5 $15.95, May 1 - May 20 $21.60, Mar 4 - Mar 15 $19.61, May 9 - May 13 $15.95, May 1 - May 20 $21.60, Mar 4 - Mar 15 $19.41, May 16 - May 20 $15.95, May 1 - May 20 $21.60, Mar 4 - Mar 15 $19.21, May 22 - May 31 $15.94, May 22 - May 31 $21.60, Mar 4 - Mar 15 $19.01, Jun 5 - Jun 9 $15.50, Jun 5 - Jun 19 $21.60, Mar 4 - Mar 15 $18.82, Jun 13 - Jun 19 $15.50, Jun 5 - Jun 19 $21.60, Mar 4 - Mar 15 $18.63, Jun 23 12:00 am $12.38, Jun 23 12:00 am $21.60, Mar 4 - Mar 15 $18.44, Jun 26 - Jun 30 $12.11, Jun 26 - Jul 5 $21.60, Mar 4 - Mar 15 $18.25, Jul 5 2:08 am $12.11, Jun 26 - Jul 5 $21.60, Mar 4 - Mar 15 $18.06, Jul 10 - Jul 20 $15.50, Jul 10 - Aug 3 $21.60, Mar 4 - Mar 15 $17.87, Jul 23 - Jul 29 $15.50, Jul 10 - Aug 3 $21.60, Mar 4 - Mar 15 $17.15, Jul 30 - Aug 3 $15.50, Jul 10 - Aug 3 $21.60, Mar 4 - Mar 15 $16.46, Aug 7 - Aug 10 $15.00, Aug 7 1:54 am $21.60, Mar 4 - Mar 15 $16.46, Aug 7 - Aug 10 $10.97, Aug 10 10:05 pm $21.60, Mar 4 - Mar 15 $15.80, Aug 14 - Aug 18 $10.30, Aug 14 - Aug 18 $21.60, Mar 4 - Mar 15 $16.11, Aug 22 - Aug 26 $10.29, Aug 22 6:31 am $21.60, Mar 4 - Mar 15 $16.11, Aug 22 - Aug 26 $14.98, Aug 26 12:50 am $21.60, Mar 4 - Mar 15 OOS $16.27, Aug 29 6:46 pm $8.75, Aug 29 6:46 pm $21.60, Mar 4 - Mar 15 $16.27, Aug 31 4:19 pm $8.70, Aug 31 - Sep 2 $21.60, Mar 4 - Mar 15 $16.43, Sep 2 - Sep 6 $8.70, Aug 31 - Sep 2 $21.60, Mar 4 - Mar 15 $16.43, Sep 2 - Sep 6 $14.20, Sep 6 12:14 pm $21.60, Mar 4 - Mar 15 $16.59, Sep 10 - Sep 14 $8.63, Sep 10 10:16 am $16.59, Sep 10 - Sep 14 $16.11, Sep 14 - Sep 27 $11.51, Sep 14 6:34 am $16.75, Sep 18 - Sep 22 $16.11, Sep 14 - Sep 27 $9.74, Sep 18 - Sep 22 $16.24, Sep 24 - Sep 27 $16.11, Sep 14 - Sep 27 $9.30, Sep 24 - Oct 4 $16.11, Sep 14 - Sep 27 $16.07, Sep 29 - Oct 4 $9.30, Sep 24 - Oct 4 $16.11, Sep 14 - Sep 27 $15.90, Oct 8 - Oct 12 $9.98, Oct 8 3:26 am $16.11, Sep 14 - Sep 27 $15.90, Oct 8 - Oct 12 $9.80, Oct 12 5:35 am $16.11, Sep 14 - Sep 27 $15.74, Oct 16 - Oct 20 $9.57, Oct 18 4:34 am $15.74, Oct 16 - Oct 20 $11.75, Oct 20 - Dec 1 $9.50, Oct 20 5:21 am $15.59, Oct 24 - Nov 17 $11.75, Oct 20 - Dec 1 $9.36, Oct 24 2:36 am $15.59, Oct 24 - Nov 17 $11.75, Oct 20 - Dec 1 $9.21, Oct 28 1:01 am $15.59, Oct 24 - Nov 17 $11.75, Oct 20 - Dec 1 $9.04, Nov 1 1:05 am $15.59, Oct 24 - Nov 17 $11.75, Oct 20 - Dec 1 $8.91, Nov 5 1:51 am $15.59, Oct 24 - Nov 17 $11.75, Oct 20 - Dec 1 $8.77, Nov 9 4:31 am $15.59, Oct 24 - Nov 17 $11.75, Oct 20 - Dec 1 $8.66, Nov 13 7:19 am $15.59, Oct 24 - Nov 17 $11.75, Oct 20 - Dec 1 $8.53, Nov 17 2:17 pm $15.93, Nov 21 11:32 pm $11.75, Oct 20 - Dec 1 $8.34, Nov 21 11:32 pm $16.08, Nov 26 - Dec 16 $11.75, Oct 20 - Dec 1 $8.11, Nov 26 10:23 am $16.08, Nov 26 - Dec 16 $11.75, Oct 20 - Dec 1 $7.88, Dec 1 6:54 am $16.08, Nov 26 - Dec 16 $11.75, Oct 20 - Dec 1 $10.95, Dec 6 3:57 am $16.08, Nov 26 - Dec 16 $11.75, Oct 20 - Dec 1 $11.29, Dec 11 6:30 am $16.08, Nov 26 - Dec 16 $11.75, Oct 20 - Dec 1 $10.18, Dec 16 7:35 am $16.24, Dec 21 5:03 am $11.75, Oct 20 - Dec 1 $11.44, Dec 21 5:03 am $16.15, Dec 26 6:31 pm $11.75, Oct 20 - Dec 1 $8.67, Dec 26 6:31 pm $15.66, Dec 31 - Jan 5 $12.53, Dec 31 10:07 am $11.75, Oct 20 - Dec 1 $15.66, Dec 31 - Jan 5 $15.00, Jan 5 - Jan 17 $11.75, Oct 20 - Dec 1 $15.26, Jan 7 - Jan 17 $15.00, Jan 5 - Jan 17 $11.75, Oct 20 - Dec 1 $15.33, Jan 22 - Jan 25 $14.97, Jan 22 3:16 pm $11.75, Oct 20 - Dec 1 $15.33, Jan 22 - Jan 25 $14.91, Jan 25 4:48 am $11.75, Oct 20 - Dec 1 $15.40, Jan 27 - Feb 1 $14.79, Jan 27 6:57 pm $11.75, Oct 20 - Dec 1 $15.40, Jan 27 - Feb 1 $14.97, Jan 30 7:43 am $11.75, Oct 20 - Dec 1 $15.40, Jan 27 - Feb 1 $14.79, Feb 1 8:17 pm $11.75, Oct 20 - Dec 1 $15.93, Feb 6 - Feb 23 $14.61, Feb 6 10:30 pm $11.75, Oct 20 - Dec 1 $15.93, Feb 6 - Feb 23 $11.88, Feb 12 - Feb 23 $11.75, Oct 20 - Dec 1 $29.00, Feb 28 8:19 am $25.00, Feb 28 8:19 am $11.94, Feb 28 8:19 am $27.84, Mar 12 1:54 am $26.70, Mar 12 - Apr 10 $9.00, Mar 12 - Apr 4 $27.56, Mar 23 11:14 pm $26.70, Mar 12 - Apr 10 $9.00, Mar 12 - Apr 4 $27.28, Apr 4 - Apr 10 $26.70, Mar 12 - Apr 10 $9.00, Mar 12 - Apr 4 $27.28, Apr 4 - Apr 10 $26.70, Mar 12 - Apr 10 $11.16, Apr 10 5:08 am $27.28, Apr 4 - Apr 10 $11.16, Apr 10 5:08 am $27.00, Apr 22 2:31 am $10.78, Apr 22 2:31 am 51,704 911,270
1,171,875
781,250
390,625
Oct
Dec
Feb
Apr
Jun
Aug
Oct
Dec
Feb
Apr
Jun
2015
2016
Price Details
New
Latest
$27.00 9 hrs ago
Highest
$29.00 Feb 28, '16
Lowest
$15.26 Jan 7, '16
Average
$27.39 (30d avg)
Added
Oct 8, 2013
3rd Party New
Last Seen
$26.70 Apr 10, '16
Highest
$26.70 Mar 12, '16
Lowest
$11.75 Oct 20, '15
Average
$26.70 (30d avg)
Added
Oct 8, 2013
3rd Party Used
Latest
$10.78 9 hrs ago
Highest
$18.10 May 3, '14
Lowest
$6.23 Aug 8, '14
Average
$9.86 (30d avg)
Added
Oct 8, 2013
Sales Rank
30 day average: 427,282 532,018
Product Description
All volumes in this series have been developed in accordance with performance-based principles and methodology, integrating speaking, listening, reading, writing and culture. Grammar points are systematically introduced with simple but adequate explanations and many examples.
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