RavenDB is fast becoming pretty popular and 2 of the best resources I find for learning is TekPub and Pluralsight, these sites are for developer training and require you to pay for them.
Both sites offer subscriptions but Tekpub also offers the ability to pay for a single course such as the RavenDB course, which is a nice addition.
Tekpub Course Details:- Tekpub RavenDB course
“In this production, Oren Eini walks Rob through the various aspects of RavenDB – from the basics through to advanced Administrative Tasks. Along the way you’ll learn how to query with the core Lucene engine, how to index your documents for searches, backups, sharding, replication to SQL Server, and how to plug all of this in to an ASP.NET MVC application.
This series is In Production which means we are actively recording and producing content for it. Currently we have 10-12 episodes planned.”
- Pluralsight Course Details:- Pluralsight RavenDB course
I have watched both courses and they are both superb and I encourage you to check them both out.