A very good book about code reviews. Very easy reading. Her style reminds me very much of Fab.If you read it you will know what I mean. Very easy and fun read.
Talks about a variety of different things to check for, such as code and design smells, proper architecture and use of data structures, etc. Talks about team dynamics.
"Coding is an art, not just following the syntax"
"Knowing a programming language is not enough to be good at it."
Also if you are trying to learn Python there is section where she talks about the GOF patterns and shows how to implement them in Python.