I read "Dracula" by Bram Stoker for the first time last year, because of the Dracula Daily newsletter, and loved the heck out of it. The newsletter sent out the book in "real time" according to the dates of all the letters etc in the book, rather than the order that Stoker put everything in, so it was a bit of a sideways way to read it, but it was so fun. It created a surprising amount of suspense to wait for each email to arrive, sometimes with gaps of a couple weeks between them. Plus, the massive, informal tumblr book club that formed around it was a great addition to the experience, really top notch to read everyone's responses to the the latest email and read longer analysis posts along the way. The guy who ran the newsletter is going to publish a book version of it, including fanart, memes, and notable posts along side each day, and I'm really looking forward to it.