Eclipses
$6.79 - $26.79
Shipwrecks
$7.29 - $23.31
Northern Lights
$8.53 - $18.49
How Electric and Hybrid Cars Work
$22.29
Alexander the Great
$9.59 - $12.09
Morocco
$5.19 - $5.79
Stars and Constellations
$5.79 - $8.53
Popular Culture: 1940-1959
$14.39
Suzanne Collins
$8.39
The Winter Olympics
$5.09
Popular Culture: 2000 and Beyond
$5.89
Comets
$15.69
Fun Magic Tricks
$9.09
Louis Pasteur (Science Biographies)
$5.09
Libya
$8.39 - $8.89
Money in Sports
$5.09 - $24.98
Is Time Travel Possible?
$305.89
Immigration
$10.78 - $26.72
The Home Fronts in World War I
$21.69
The National Archives: World War I Unclassified
$9.29
Ancient Treasures
$9.59
The 2012 London Olympics: An unofficial guide
$7.92 - $23.73
Cyber Bullying
$5.89
Julius Caesar
$6.29 - $10.79
History Around You
$7.92
Finding Out about Your Family History
$7.92 - $21.65
Steve Jobs (Titans of Business)
$9.15 - $24.98
Animator
$5.09 - $6.99
Daily Life in the Maya Civilization
$8.39 - $9.99
Why Should I Care about the Ancient Egyptians?
$8.53