Pressbooks - Create books: print and ebooks
Time Capsule - Transform your 2020 into a tiny, personalized book for free!
Storyboard - Press kit platform
Impressed Photo Books - Create a photo book in minutes. Starting at $22.
boook.link - boook.link is a web-based tool for creating one single link / landing page for a book, so your readers can choose from which store to buy the book.
Marvel (Comics) API - Create awesome stuff with the world's greatest comic API