Free Calculus Textbooks

By Xah Lee. Date: .
Integral approximations
Integral approximation. image source

Here's a collection of calculus textbooks. These are top quality, and legally free.

• APEX Calculus by Gregory Hartman et al. Calculus__Gregory_Hartman_2014.pdf

• Calculus Volume 1. OpenStax project. calculus-volume-1-2.33.pdf by Gilbert Strang, Edwin Jed Herman, et al.

• Calculus from mooculus project. by Jim Fowler, Bart Snapp 2014. calculus_mooculus_jim_fowler__bart_snapp_2014.pdf

real analysis by Jiri Lebl 2016 real_analysis_by_Jiri_Lebl_2016.pdf