Goodreads - See what your friends are reading.
Mattermark Daily - A curated newsletter of blog posts from investors & founders
LibraryThing - A home for your books.
Startup Curated - The best of the week for founders, in one minimal email
BookAuthority - BookAuthority collects the most recommended books on business, technology and science - as featured on CNN, Inc and Forbes
Startup Quote - Awesome founders provide wisdom about making things