Documentation for Fedora Core is available from the Fedora Project Website:

http://fedora.redhat.com/docs/

The Linux Documentation Project (LDP) produces books and tutorials:

http://www.tldp.org/

For many parts of Fedora Core, you may find the Red Hat Enterprise Linux documentation useful:

http://www.redhat.com/docs/manuals/enterprise/

Many other organizations and individuals also provide tutorials and HOWTOs for Fedora on their Websites. You can locate information on any topic by using Google:

http://www.google.com/linux