I can see people having quite different opinions about this book, but I really don't see anyone loving it. I liked that it was a quick read. The chapters are rarely longer than 3 pages. It has some funny parts but never laugh-out-loud funny. It is part murder mystery, part romance, part study in psychological disorders.
The premise of the book is really off the wall, but I'm willing to suspend disbelief for a good story. This is only a so-so story. Cadence works for a division of the FBI called BOFFO. Apparently they are staffed solely by people with fairly severe psychological disorders. In real life these people would never get into the FBI (except maybe as criminals). Cadence, our heroine's, disorder is multiple personality disorder. She witnessed a terrible trauma at age three that caused her to develop two added personalies she calls "sisters" - Shiro and Adrienne. Shiro, a petite Asian, is the no-nonsense martial arts expert that comes out when Cadence is in danger. Adrienne is the psychotic, totally deranged sister that comes out when Cadence is angry, as far as I can tell. Adrienne's part of the book were the strangest, written in verses, often including "Wheels on the Bus."
Cadence is the "normal" personality. She's pretty and blonde, is friendly, has good people skills, doesn't swear and thinks she's a virgin. Meanwhile her sisters leave her to wake up naked in bed with strange men.
Cadence and the BOFFO team are trying to catch a serial killer nicknamed ThreeFer because he kills in threes. The murder mystery part of the book was actually pretty clever and unpredictable. That said, the ending wasn't all that spectacular.
This was a so-so read, and I wouldn't really recommend it to my friends.