I don't know how they do it. I had forgotten who Luke was from the prior books, and was utterly charmed with him. He was no baggage, his character was woman-centric (even if hung out with piggy water polo players) I really got his appeal. London was at times reserved beyond reason - though it was believable - at times it was frustrating because I didn't believe she'd be motivated by what her friends thought, as an example. The chemistry in the book was explosive, and it certainly made me LOL at times.
They also summed up my love-feeling:
"How can he feel both like an adventure and a comfort?"
I loved his lack of reluctance and openness...his vulnerability. Luke just made sense to me-and was totally age appropriate (young, and confident, but not overly mature etc)
I just love this writing duo...