Batman: Face the Face
We find the answer by the end of this book, and the man behind all this. Some little clues are planted along the way, but there was no way anyone could have been able to guess exactly who was the culprit.
The relationship between Batman and Robin is also given "screen time", and by the end it will change dramatically. I love the final scene where Bruce tells Tim about his plans for Tim's future.
Some unanswered questions: why were Ivy and Croc more powerful than before? Why did both Robin and Nightwing go away with Batman? And what did they do for a year? This will obviously answered in 52. Or at least I think so.
The art is split evenly between Leonard Kirk and Don Kramer. I prefer Kirk's style, but Kramer did a fine job too. I also loved the colors, especially the scene where red was the main color. A very good arc, that lays down some seeds for upcoming stories.