Many years ago I read Ben Forta’s MySQL Crash Course
Its still targeted at beginners, and covers many of the new features that are available in MariaDB up to version 5.2. I had the pleasure of pre-reading it, and did send in lots of comments to Ben, and if implemented we’ll see some stuff in there that is current even for MariaDB 5.3, like dynamic columns and more.
You can pre-order the MariaDB Crash Course