This book has its good moments, and I don't regret reading it, but overall it was nothing special. I liked Aden's situation--stuck with four other souls in him since birth, always chattering away and distracting him until they've more or less unintentionally ruined his life. I also enjoyed having the male and female leads be in a friends-only situation, which is just not something you see very often. However, the love interests ended up being very flat characters for me. "They're sexy and mysterious! They love Aden and Mary Ann immediately and for no apparent reason! And did I mention sexy?"Much of the book felt to me like the author hadn't really figured things out ahead of time and was coming up with implausible and/or lazy plot points as she went along in order to explain things. It felt very haphazard. When the characters found out vital information along the way, instead of saying, "Ah, of course! That makes sense!" I thought, "Wait, what? Really?"However, the group dynamic between Aden and his four voices makes this book worthwhile.