The biology books are on level 6 in the Q and R callmark areas, but remember the library has many Ebooks which are not on the shelves.
These Ebook collections include academic books in the life sciences.
If you are unfamiliar with your topic, learn more by browsing these encyclopedias.
These websites contain free science content suitable for academic study. Let me know if you have a favourite biology website and I will consider adding it to the list.