Linux rules the heart of its users. This is enough a reason why one should embrace Linux

The LinuxGuruz Page , a site of volunteers authoring, reviewing and managing documents about the Linux operating system, Linux services. Collection of Linux documents. Collected from several sources. 

All the documentation is freely available in several formats suitable for printing and on-line browsing.

This is only an article, not a book. Some people who have done fantastic work are not mentioned here.

Linuxguruz