I have been reading and enjoying the Unofficial Guide to the DC Universe, particularly the Who's Who in the DC Universe. I have always been more of a Marvel reader than DC, but it has been neat to see the comics origins of many Sandman characters, such as Lyta Hall and Cain and Abel. I had always caught many of the classical and mythological allusions, but it wasn't until rexently that I have been picking up on the comics allusions. I didn't even know that Matthew the Raven started out as Matthew Cable from Swampthing.
It's an interesting read, even if you only know a little bit aboout comics.