I think this is the Forum the book refers to, but they didn't actually put any content in after writing the book.

Linked from the chapter page though, there is this additional page: Articles on Choosing Modules which has three links. It's not quite "links to many other web resources" but at least it is a start.

The second of the links on that page is good and it provides links to other sites such as http://drupalmodules.com/