In Madhouse, Cal and Niko are still getting into trouble as usual. Promise gets the boys a gig through a friend at a museum. Something has escaped the museum that should not have been able to. Turns out it was an ancient serial killer known for his numerous victims and cannibalistic tendencies. While trying to catch this murderer, another problem arises when Cal's new boss tips them off that someone has put a hit out on Robin. Robin can't even remember how many people's he's pissed off enough to put a hit out on him, leaving the brothers no way to help him. Cal's also been trying to deal with trying to stay away from George but he doesn't want to be lonely. Cal's gate creating abilities are also starting to become a problem when they start causing him migraines and a significant loss of blood. Add on to his plate a new werewolf interest and Cal will have to watch more than his back if he's going to survive.

Perhaps this is just me but even with everything going on in this book it didn't feel as action-packed as the previous books. I think because a big part of this book is Cal finally dealing with some emotions and realizing he and his brother aren't alone anymore. Niko was also not as present in this book which was rather saddening. Even so, I still highly enjoyed it and am dying to read the next book as there is a cliffhanger at the end. Curses.