For book/ebook authors, publishers, & self-publishers
Plus see what authors are visiting your area. Keep track of all book signings, interviews and other events. Those who are writing books that complement yours may enjoy meeting you, getting your support is attract a crowd to their appearances, your insights about local media - and then helping you when you are on tour. See BookTour. Co-founder Kevin Smokler is knowledgeable and helpful to us authors.
Adam Goldstein is their CTO and one of the three co-founders. Also see their blog It has an interesting post re Writer's Digest's profile of their CEO Chris Anderson.