In this Alex Martelli covers the Python language and the standard library. Now, in most books of this type, the typical comment is "all the information is on the web." Well, in this case, no. For each section, Martelli opens with a brief essay explaining the purpose of the module and an explaination of what problem the module was trying to solve. And these essays are a great introduction to some of the details of computer science and programming (yes, two topics). There are some things that I never understood until I came across them in this book while trying to solve a coding problem. Using this book I wrote my way out of some problems in a way that I would have viewed as magic only a few months ago.
Very little fluff, and a lot of well written prose and code. Well recommended reference and the reading gives great insights.