Start with keyword searches for your desired topic - when you find one that's relevant, follow its subject headings to find more like it. Subject headings will be something like "Epidemics -- History -- 18th Century" or "Medical History" or "Obstetrics -- History"
Sorting by date can be a useful way to find recently published books, and you can limit to ebooks or print books, as you wish.
If you'd like to borrow a physical (print) book, you can request it for pickup by using the 'Hold/Recall' underneath the 'Get It' heading in the book record. Books will be available to pick up at the library's loan desk. You can request a number of books to investigate (becuase you can't really judge a book by it's record), and return any unwanted books immediately using the drop bin beside the library's front door. You can even book a study space in advance, to review your books in comfort!
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