Main tip: If you know the exact title, or part of it in a phrase, search it "with quotation marks around it" to narrow the search results.
Here are the places librarians are likely to check for digital copies you also might want to try:
Library search (double check to see if you have the correct record, or if the records for a book could have been recently re-loaded)
If you discover what you are looking for turns out to be a book chapter (or a journal article), put in a request through ILLiad for Interlibrary Loan (ILL) to see if they can get a scanned copy. (ILL cannot get entire ebooks or scanned copies of entire print books.)
Relevant ebook databases -- (some might not have individual records in Library Search)
HathiTrust Digital Library (more info on how HTC emergency temporary access works)
Google Books (sometimes the preview available includes the portion you need)
Google Scholar and Google.com (sometimes institutional repository draft versions, public Research Gate copies, or other websites will come up here)
VitalSource and RedShelf (if it’s a textbook and there’s no other source. This requires registration for access, free access ends in May, and you may receive future solicitations to buy textbooks)
Free Library of Philadelphia Digital Media platforms (e.g. Overdrive, Hoopla, Kanopy; especially good for popular items)
