this book should never have been printed a digital copy would be enough ... at least that could save some typing...

and there is not enough value for the price that it has been sold for ... there is nothing special in this book that anyone who are interested in apis dont already know I gave it one star only for the cover design

This book is extremely disappointing and has precious little information about the data sources listed. It's really just a list of links spun out in a criminally overpriced book. Do not buy the printed version. At $30, it is basically $1 per page. Yes, that's right. The book only has 32 pages!!! Perhaps the electronic version is worth the price, but even that is debatable.

Having pre-ordered this book, I was very disappointed when I actually received it. It is far too short to justify the effort and material required for constructing a cover around the content. The information contained in the book should have been laid out in a set of web pages in order to be useful. This would have made sense considering that the book intends to provide information about public online data sources.

For each public data source listed in the book, the description is a title, a short paragraph describing the data source, and a URL or curl request. In some cases a json or xml response from the service is shown. This level of detail is disappointing and uninteresting (IMHO).

In the preface the author references a website listing public sources of information, [...]. The API directory on this website contains far more sources of data than this book (which lists about 57 or so). My advice would to someone looking for public data sources would be to start at that website and not to waste money on this book.