Here is an interesting literary note: Other people read books, but the Aleister Crowley folks actually celebrate a book. Thursday, today and Saturday are "The Feast for the Three Days of the Writing of the Book of the Law," according to this handy Thelemic Holy Days summary offered by an OTO chapter in North Carolina.
The local equivalent near where I live is the Black Sun Lodge in Cleveland, which is observing the Three Days with a social event Saturday at a local park. So I guess it is generally observed by Thelemic folk.
The Book of the Law is "the central sacred text of Thelema," according to Wikipedia. The text is available online. I don't get why Project Gutenberg lacks a copy, as it is out of copyright, but the Internet Archive has it in a variety of formats, including ePub and for Kindle.
Hat tip: Gregory Arnott.