https://www.teachingbooks.net/ - Includes author and illustrator interviews, name pronunciations, lesson plans, links to free supplemental materials and a strong title discovery tool (Not free)
https://s2.netgalley.com/ - Teachers and librarians can sign up to receive free digital Advance Readers Copies of upcoming releases
https://archive.org/ - The Internet Archive; attempts to create a digital trail of the websites and communications that would otherwise disappear. The Wayback Machine allows you to view websites as they looked on given dates in the past - can be a way to access documents that have been taken down from the web or to peer back through history!
http://bookriot.com/ - If the New Yorker is a bit too academic for your taste, Book Riot offers up everything from podcasts, videos, book clubs, reviews and pop culture connections. (Check out their Beliefs statement!)
https://www.libib.com/ - A cloud based cataloging platform for personal or small organizational libraries, equipped to manage books, media and video games. A pro version is available but the free version is powerful.