Like most of the author's books, without actual canine dialogue and personality to add some warmth and humor, the characters seem rather drab and depressing. I don't think I've ever read quite so many books where mid-life adult characters spend most of their time blaming everything that goes wrong in their personal lives on their parents. None of the parents in any of Markoe's books are warm, loving or supportive. Instead they all harbor varying degrees of selfishness, depression, abusive tendencies, addictions, and other depressing character flaws that quite too much time and attention is given to detailing.
The concept of this novel (once you get around to it, if you can hang in that far) is, however, entertaining enough to eventually compel a reader to continue to pick it up in order to see what happens next. The idea of a "war" between strangers who take turns regaling each other with tales of Psycho Exes, each trying to outdo the other in order to win the "game" is, at least, entertaining, and anyone who has had the opportunity to swap emails with another person in what develops into an online only "relationship" will enjoy the read and grasp the point of the book.
I only wish the author could manage to avoid writing about topics that are so dark, dreary and depressing, for once. These (barring Walking in Circles Before Lying Down and Nose Down, Eyes Up) are books that, as a younger, less mature reader, I would have given up trying to read, let alone finish.
I realize people "write what you know", and that as a resident of NY and LA the author has dozens of despondent, real life experiences to draw from, but allowing a little l ight into such a gloomy world once in a while wouldn't hurt.