Not the cheap cash in you may have been expecting, this is actually a very well done, thoughtful collection of stories designed to link together Superman 1 and 2 and Superman Returns, by revisiting history and showing where those characters have ended up. The stories only feature Superman in flashback, and focus on Jor-El, Ma Kent, Lex Luthor, and Lois Lane. Some of the stories feature actual scenes and dialogue from the original films, which gives a nice connection.
All the stories are well written, the characters feel authentic, and the classic feel of the films is on every page. It is a great companion to the films no doubt.
If you love Superman, you'll love this.