Secret Wars 1-3
I'm not going to go into much detail, but these books are highly recommended (by me) anyway, so go get reading and check out my review:
Secret Wars #1
You have to read Secret Wars #1 twice to love it: On the first read you'll probably not have a clue of everything that's going one; on the second read (when you're reading to do a review on your blog after having read a few other Secret War tie-in titles) you'll realize how epic it is.
Secret Wars #1 excellently sets the stage for what the rest of the series is going to be. It opens with the war between 616 and 1610, with backstage, evilous players such as 1610's Reed Richards and (I think) 616's Thanos and The Cabal, as the two worlds are colliding. Needless to say, nobody wins the war and the 616 team manages to get some select heroes on a safety raft to survive the incursion.
We also see Doom being set up to become the God of the BATTLEWORD that ensues.
What I liked? : On the second read? EVERYTHING!! Just get ready for a great series. There is so much happening in this book: Look out for development with Phoenix-Cyclops, a mourning 616 Reed, evil 1610 Reed, The Cabal and God-Doom.