I plan to create a Q&A website for my school that allows people to post questions they have on SAT/ACT problems. Because most of their questions would be specific problems in the SAT books(such as Barron's, Official SAT guide), would I have to get the authors' permission to post the book's SAT problems? Sites like cramster.com allows users to post questions from textbooks, does cramster get permission from the textbook's authors?