How to save on biology textbooks
Biology courses tend to assign a small number of large, expensive standard texts that are reissued every two to three years — which means used copies of recent editions are plentiful and cheap if you buy before term starts. Search by the ISBN on your syllabus rather than by title, compare several marketplaces since the cheapest one differs book to book, and check whether your course requires an online access code before you buy second-hand.
For a fuller breakdown, see our guides on finding the cheapest copy, renting versus buying, and whether an older edition will do.