Okay, in a nutshell, I could describe Jameson (better known as Jamie) Rook in two words.
*insert fan girl swoon*
Seriously, though. Jameson Rook is basically a carbon copy of Rick Castle. And Jamie's off and on girlfriend is based on Kate Beckett.
It's basically the show Castle in word form.
I'm currently reading the third book from the Nikki Heat series, Heat Rises, and so far, no Jamie. But, I think what makes me love him, besides the fact that he's just like Castle, is because he's a writer. I mean, it was kind of easy to know what he would do, because I'm such a fan of the TV show, but still.
I'd marry either Rook or Castle in a heartbeat.