I stand corrected. For some reason Amazon does not show excerpts when looking just for CentOS. And the list of books that match CentOS is incorrect. Now if I redo my search query using CentOS Linux the real search-inside-the-book mechanism starts to work. Maybe it requires at least 2 keywords?
The result is a shining 15 books that contain CentOS in one way or the other.
These books are real bibles containing more than 1000 pages. They go into details about everything, but they fail to mention the RHEL rebuild distributions like CentOS or Scientific Linux.
Something is going on here ?