When you have finished the recipes in this book, you should have a good understanding of how Zabbix works, but you will probably also have many more questions on how to monitor certain things in your environment.
I encourage you to join the Zabbix community. Zabbix provides a page where all information is gathered from the community, http://www.zabbix.com/community.php.
A lot of information can be found on the Zabbix forums where people have posted questions and received answers for their problems, http://www.zabbix.com/forum.
If you need ...