STEM
North American Odyssey: 12,000 Miles Across the Continent by Kayak, Canoe, and Dogsled $7.44 /Buy 3, Get 1 Free
The Eagle's Quest: A Physicist Finds the Scientific Truth at the Heart of the Shamanic World $4.39 /Buy 3, Get 1 Free
Relativity: The Special and the General Theory - 100th Anniversary Edition $6.59 /Buy 3, Get 1 Free
Theory of Wing Sections: Including a Summary of Airfoil Data (Dover Books on Aeronautical Engineering) $5.82 /Buy 3, Get 1 Free
Feynman's Tips on Physics: A Problem-Solving Supplement to The Feynman Lectures on Physics $6.28 /Buy 3, Get 1 Free
Algebra 1: Integration - Applications - Connections: Teacher's Wraparound Edition $6.82 /Buy 3, Get 1 Free
Unsettled: What Climate Science Tells Us, What It Doesn't, and Why It Matters $4.58 /Buy 3, Get 1 Free