I have my own confession to make, I don't read these books for the mystery as much as I read them for the characters. Especially Sebastian St. Cyr, Viscount Devlin. He's such a compelling character--"thirty years old, tall and lean, with a vaguely menacing bearing that reminded one of the time he'd spent as a cavalry officer." He has golden eyes that see in the dark and a passion for making sure that murder victims who would otherwise be forgotten get justice. He's the kind of character a girl can crush on.
If you've never read a Sebastian St. Cyr mystery before, I suggest you start with the first in the series, What Angels Fear, although I read the third book, Where Serpents Sleep first myself. They're all great reads. I love this series and these characters. And my bookish bonus with Why Kings Confess is that it fills another category for me in the What's in a Name Reading Challenge. Category filled with this book: Read a book with a position of royalty in the title. My current Reading Challenge status: 4 books read; 1 book to go.