i have the following textbooks required for these courses:

gs191 - essential mathematics third edition. it's in fair condition. the bookstore sells it for $75. i am selling it for $30.

gsge106 - canadian studies: places, perspectives and peoples. it's additional course notes and readings. it comes also with a map of canada. the bookstore sells both for about $27. i am selling for $12.

gs180 AND gs280 - introductory chemistry: a foundation sixth edition. it's in excellent condition. the bookstore sells it for $120. i am selling it for $60.