BOOK COLLECTIONS - Open Access
OPEN TEXTBOOK LIBRARY (click for catalog)
HEALTH TEXTBOOK - HERE (Open Textbook Library) - PDF version HERE
Cambridge University Press (Link)
Cambridge University Press is making higher education textbooks in HTML format free to access online during the coronavirus outbreak. Over 700 textbooks, published and currently available, on Cambridge Core are available regardless of whether textbooks were previously purchased. Free access is available until the end of May 2020. https://www.cambridge.org/core/what-we-publish/textbooks
Book Collections Online (https://onlinebooks.library.upenn.edu/)
College Board SAT and SAT Subject Tests (https://research.collegeboard.org/programs/sat)