Book about MySQL NDB Cluster open source database written by its founder. I've challenged myself to read the book as a way of learning more about the product I work for (I work for the team developing MySQL NDB Cluster, and colleague of Mikael). This book shares a broad knowledge about the many parts of the database, ranging from simply configuring and starting the database, to details on how signals flow within the database to process a query. As an intermediate reference is a great place to find information. For early beginners it can be a bit overwhelming or missing some background but definitely a help in starting with NDB.