Essential SQLAlchemy The author does a good job of presenting enough background material , such that anyone with a basic understanding of Python and SQL should be able to easily follow the book. As stated in the preface it goes deeper than the available tutorials, and though it does include descriptions of SQLAlchemy api's, I found it leaves some details out that will need to be figured out by the reader. There are a few cases where it wasn't clear what default values for a few of the defined parameters. Most of the descriptions include examples of code which help understanding all the nuances of SQLAlchemy.

I found the book moves at a good pace, it presents a complex subject in a clear manner and is an excellent way to get started and understand how to use a truly great product. A good investment for anyone needing to manage data and build good OO applications.