couchdb

CouchDB: The Definitive Guide. Oh, the CouchDB book by O'Reilly is also available as an online book and even in German. Certainly interesting for one or the other who doesn't feel like wading through English books. The translation is not (yet?) complete, so you will still come across English chapters. But it's a start.

CouchDB: The Definitive Guide. And since it fits so well, here is the link to a book on CouchDB for online reading. It is also available online in German (and of course in English. And also in French). However, the German version seems to be incomplete - you keep encountering English pages.