You're looking at it right now. AT of course.
Then, my own tarot journal that I started in 1991 - hand written first, then Evernote, and two extra journals for shadow work and Lenormand.
Books: anything by Mary Greer, Anthony Louis, Robert M. Place and Elizabeth Hazel. For Thoth, Crowley himself, Milo DuQuette and Snuffin. Katz/Goodwin are good reads, too, but there's much stuffing between the precious chunks (sorry).
I love also Benebell Wen's tome, Deborah Lipp and many other books. Having a tarot library is very helpful. It's difficult to pinpoint one book. I like reading three books parallel - one of them is usually a tarot book.
Websites: there are tarot blogs where I graze regularly but can't mention one specific. There are many very good ones. I like Villa Revak.
My decks and their lwbs are also good sources. Much can be gleaned from looking properly at a deck.