12 textbooks free for kindle

Found this on I love my Kindle Blog and thought it was worth it. 12 free Kindle text books 🙂

CK-12 21st Century Physics: A Compilation of Contemporary and Emerging Technologies

CK-12 People’s Physics Book Version 2

CK-12 Advanced Probability and Statistics

CK-12 Chemistry

CK-Algebra 1

CK-12 Biology I – Honors

CK-12 Geometry

CK-12 Life Science

CK-12 Calculus

CK-12 Earth Science

CK-12 Trigonometry

CK-12 Engineering: An Introduction for High School