CA's Reference Guide for DB2 9 for z/OS

It's sheer coincidence that I've had more posts on CA in the last month than I had in the last year. Or perhaps I'm also caught by their May Mainframe Madness ? Here's just a short notice of something I once in a while come across but have never mentioned so far : the Reference Guide for DB2 9 for z/OS. What is it ?

CA’s Reference Guide for DB2 9 for z/OS is a rich technical resource for database management professionals.
CA’s Reference Guide for DB2 is an easy-to-use book that provides instant access to DB2 information, such as system commands, utility syntax, catalog tables, and much more.

The link to obtain it : ca.com/us/register/form.aspx?cid=93649.