This book is definitely one of the more serious Karen White books I've read lately. It has her usual style of mystery with a touch of romance, but also touches on more serious issues - like bipolar disorder and how it can affect everyone around the person suffering - and it also shows the chapters from a different perspective in real time, which is something different.
The part that I found most intriguing was how she wrote Gil, one of the character's nine-year old son, who is suffering trauma and refuses to speak. When we read from his point of view, it's easy to see that he's seen more in his life than most of us have and he's so mature for his age.
I thought the revelation of what happened truly in Marnie and Diane's past concerning their mother was incredible. As I've read more of Karen's books, I've begun to see how she thinks and I was generally able to work out what the surprises would be before they happened, but not with this book. It kept me reading literally to the last seconds of my breaks at work, and I'll be off to get another one of her books soon!