E.H.
I was going to say the same - thing the Anthony Horowitz spy series is great! My 13 year old loves them (and I read them all too!). There is also Rick Riordan who is great and if he is into sports there is a whole series of sports fiction -- can't remember the author Carl Deuker -- that is it something but names like Heart of a Champion... and also the James Patterson Maximum Ride series is another good one!