Max Online Catalog can be used for searching books, ebooks and print journals.
Use Library of Congress Classification:
QH: Natural history - BiologyQK: BotanyQL: ZoologyQM: Human anatomyQP: PhysiologyQR: Microbiology
See if other libraries have the book you want, search WorldCat:
For tip on how to search and download eBooks, please refer to the eBook guide.