https://www.nypl.org/ The New York Public Library, the big mama of them all. Any New York State resident can apply for a NYPL library card. Order physical books delivered to the branch of your choice in New York City or have digital content delivered to you instantaneously anywhere.
https://www.goodreads.com/ An “everything” site for booklovers of all stripes. I have begun (in 2020) to use the site to track my reading for the year. If you so desire, you can find me there by searching people for “starrmysteries”.
http://stopyourekillingme.com Stop You’re Killing Me.Com is the source of all things wonderful for mystery lovers. Started in 1998 by Bonnie Brown and maintained Lucinda Surber and Stan Ulrich since 2006 it is gigantic, encyclopedic and searchable.
https://www.fantasticfiction.com/ Bibliographies for over 40,000 authors. Use the browse menu to find an author by surname, or search for an author, book or series. Follow favorite authors, hear about their new and upcoming books, never miss one!