What is best affordable source to get French TEXTBOOKS?
My son's college is asking to get the books from
1. Débuts, Quia Online Workbook / Laboratory Manual Part 2, 3rd Edition
2. French- DeVerneil- Digeon
Textbook 1 site: https://books.quia.com/books
Textbook 2 site: http://www.grtep.com/
They are asking to get access code from above site for eaccess to workbook.
I am not able to find pointers for downloading textbooks sites or renting options.
I did check half.com, but this title is not coming up.
We are not able to find a rental/used book for this title in book store. Even we buy it, it become obsolete at end of semester .
The school library does not have it.
What are the sites for renting/downloading this Textbooks?
Thanks for your guidance.