Elementary Number Theory by W Edwin Clark

By Xah Lee. Date:

This book is at a level readable by highschool students.

number_theory_w_edwin_clark_91682.pdf

from http://shell.cas.usf.edu/~wclark/#ELEMENTARY_NUMBER_THEORY, as of 2018-03-10.

If you have a question, put $5 at patreon and message me.