Todd Strasser.
Titles I've written about:
Wish You Were Dead (2009):
Pluses: MODERN LOIS DUNCAN. YAAAAAY!!!
Minuses: Has pretty much all of the flaws of a Lois Duncan, including occasionally stilted dialogue, lots of telling rather than showing, cliches, and infodumps.
Blood on My Hands (2010):
Pros: Like the first book in the series, a high-interest mystery a la Lois Duncan. Unlike a lot of similar books, it took me quite a while before I correctly identified the murderer. Yay!
Cons: Also like the first book in the series (and Lois Duncan), it's got infodumps, stilted dialogue, and a lot of telling vs. showing (especially when it comes to emotion).