This NodeJS SDK integrates the Open Publication Distribution System (OPDS) catalog format with Readium enabled applications. The latest version is 1.0.13. Readium provides technology designed to accelerate the adoption of EPUB 3 and the Open Web Platform by the Digital Publishing Industry.
Big news for bookworms: HarperCollins, one of the "Big Six" New York publishers, has launched its OpenBook API Beta (not to be confused with the "Openbook" Facebook parody site), giving developers access to a wealth of data about their books and authors.
Flexpaper is an open source document viewer--and it is beautiful. The Flexpaper API lets you incorporate your publications into other applications. Flexpaper works on virtually any device and is, no surprise here, flexible. It can display in HTML, HTML5, Adobe Flash or any combination of these.