I saw this over at Lifehacker. DailyLit lets you get manageable chunks of books delivered to your email on a schedule of your liking. Admittedly, it makes the old “I don’t have time to read a book!” excuse a bit weak. Do you have time yo read an email? Then you have time to (slowly) read a book. 
You can browse the full selection of books available from DailyLit right here. Personally, I just signed up to get a chunk of On the Origin of Species every weekday. By my calculations, it’ll take me 50 weeks to read the entire book, in small-email-chunk form. Nifty.