Reddit reviews Book of Thoth: (Egyptian Tarot)

It comes with a small explanatory booklet. I'd say the best actual book that really encompasses the whole system (because obviously it's not just a mere fortune telling device) is Crowley's own The Book of Thoth (1944). https://www.amazon.co.uk/Book-Thoth-Egyptian-Tarot/dp/0877289506/ref=sr_1_2?crid=341Z03425G3GA&keywords=the+book+of+thoth&qid=1568848465&sprefix=The+book+of+thoth%2Caps%2C559&sr=8-2

However, if you're starting out with tarot or unfamiliar with Crowley's often convoluted and in depth writing-not to mention his oft made assumptions that we've all got a clue what the fuck he's trying to say- I can heartily recommend Lon Duquettes approachable, concise and easy to swallow Understanding Aleister Crowley's Thoth Tarot
https://www.amazon.co.uk/Understanding-Aleister-Crowleys-Thoth-Tarot/dp/157863623X/ref=sr_1_4?crid=341Z03425G3GA&keywords=the+book+of+thoth&qid=1568848843&sprefix=The+book+of+thoth%2Caps%2C559&sr=8-4

I'd start with the deck and Lon's book then move on to The Great Beast's volume, but I'd say they're both pretty much required reading for any serious student of the Thoth tarot. Duquette's book isn't exactly essential but it does make life a whole lot easier for us mere mortals!

Edit; there is a few other books of the deck out there but imho none come close to these two.

This will help greatly

https://youtu.be/DWhFaz415hQ