Goodreads - See what your friends are reading.
App Launch Checklist - Planning tool for launching your app successfully
LibraryThing - A home for your books.
ASO Tools by AppFollow - Tools for App Store Optimization in App Store & Google Play
GoodBooks.io - Largest curated collection of 8,500+ book recommendations.
ConversionChecklist.org - A 41 point checklist to make your website convert better