It's not necessary to have read any of the other books in the series to have enjoyed this book. I haven't and did enjoy the story. Flawed characters make for the best protagonist, and the main character comes with many flaws. Beyond that there is nothing special about this somewhat flawed lawyer and partial detective who wakes up with a girls named tattooed on his back and tries to find out why it got their. There not being anything special about the story is probably why it's so entertaining.