(By Margaret Curtis '16) Philadelphia-based Caitlin Quigley ’08 was selected as a winner of the Knight Cities Challenge for her project “20 Book Clubs, 20 Cooperative Businesses.” The John S. and James L. Knight Foundation awarded 37 winners out of a pool of more than 4,500 applicants with a share of $5 million to support one of the 26 communities in which the foundation invests. Quigley and her organization, the Philadelphia Area Cooperative Alliance (PACA), were awarded $146,000 to implement her project, which will support neighborhood businesses. Quigley's project will form 20 community-based book clubs of six to 12…