Even though Merb already has 4 books being written (2 already available in beta), the Merb core team announced they started working on an open source book with the help of the community. What’s also interesting is that even though the work on the book just started, translation is done in parallel allowing non-English speakers to access translated content without having to wait until the final version is available and then translated. Feel like helping? Checkout the book repo at GitHub.