Quirk Books is moving its distribution to Random House. The Philadelphia-based indie press--one of PW's fastest growing publishers of 2009--is currently distributed by Chronicle Books. With the new agreement, which is for three years, Quirk will move its distirbution operation to Random House on January 1, 2011. The move in part, a rep from Quirk confirmed, is due to the expanded suite of digital distribution options Random House offers.