I've read a few books and essays (and some books that are basically short essays in book form. If you check ebay, you can sometimes find 12 page hard
cover books by Crowley printed by some obscure press) by Crowley, and my favorite would have to be The Heart of the Master. I found it to be,
among other things, beautifully written and very inspired.
It's available to read on hermetic.com, though I keep a physical copy on my bookshelf.

