by Peter Ward
More Buying Choices $21.64 used (1 offer)$20.10 new (1 offer)
by Ibrahim Abdul-Matin, Keith Ellison
More Buying Choices $10.41 used (1 offer)$15.20 new (1 offer)
by Robert Zubrin
Our Price: $21.31
More Buying Choices $4.50 used (1 offer)$20.10 new (1 offer)
by Seth Shostak, G. Seth Shostak
Our Price: $13.84
More Buying Choices $3.81 used (1 offer)$62.40 new (1 offer)
by Dava Sobel
Our Price: $14.11
More Buying Choices $3.11 used (1 offer)
by Neil deGrasse Tyson
More Buying Choices $4.34 used (1 offer)
by Michael D. Lemonick
More Buying Choices $2.73 used (1 offer)$62.15 new (1 offer)
by Jeff Kanipe
More Buying Choices $103.37 new (1 offer)
by Michael Neufeld, Alex Spencer, John Glenn, John Dailey, John Glenn
More Buying Choices $5.70 used (1 offer)
by Robert Vanderbei, J. Gott, J. Richard Gott
More Buying Choices $8.21 used (1 offer)
by William Sheehan, John Edward Westfall
More Buying Choices $3.55 used (1 offer)$66.90 new (1 offer)
by Michael Sims
More Buying Choices $5.70 used (1 offer)$101.51 new (1 offer)
by Kathleen V. Kudlinski, John Rocco
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by David H. Levy, Stephen James O'Meara
More Buying Choices $9.96 used (1 offer)$22.40 new (1 offer)
by Philip S. Harrington
Our Price: $16.21
More Buying Choices $2.77 used (1 offer)$15.58 new (1 offer)
by Arthur W. Staats
More Buying Choices $10.71 used (1 offer)$62.14 new (1 offer)
by George Greene
Our Price: $30.02
More Buying Choices $39.31 used (1 offer)$31.90 new (1 offer)
by Ken Croswell
Our Price: $17.58
More Buying Choices $5.70 used (1 offer)$16.23 new (1 offer)
Our Price: $27.83
More Buying Choices $10.95 used (1 offer)$27.96 new (1 offer)
by Fred Schaaf
Our Price: $16.89
More Buying Choices $4.48 used (1 offer)$14.61 new (1 offer)
by Carl Sagan, Ann Druyan
Our Price: $20.93
More Buying Choices $4.31 used (1 offer)$19.33 new (1 offer)
by E. A. Beet
Our Price: $17.24
More Buying Choices $16.18 new (1 offer)
Our Price: $17.98
More Buying Choices $7.80 used (1 offer)$16.96 new (1 offer)
Our Price: $21.33
More Buying Choices $6.75 used (1 offer)$20.01 new (1 offer)
by Dana Mackenzie
Our Price: $13.76
More Buying Choices $7.20 used (1 offer)$15.57 new (2 offers)
by Isaac Asimov
More Buying Choices $6.23 used (1 offer)$101.43 new (1 offer)
by Shawn Carlson, Scientific American
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by Eric Chaisson, Lola Judith Chaisson
Our Price: $19.48
More Buying Choices $5.43 used (1 offer)$18.51 new (1 offer)
by Jill Smolinski
Our Price: $18.76
More Buying Choices $4.22 used (1 offer)$17.73 new (1 offer)
by Jacqui Cannon