"The Scarecrow" is good, but it's not Connelly's best - I'm not a big fan of the whole "the reader knows who the killer is right from the start". I quite like his work when I'm in the mood for a good detective novel, but I vastly prefer his stories with Harry Bosch being the main guy. If you're interested in looking further into his work, then I'd recommend "Angels Flight", "The Last Coyote", "The Concrete Blond" and "Blood Work".