Problems come not as as single corvids, but as full flocks... Life at the Center for Applied Topology is never precisely normal, but Thalia Kostis, Brad Lensky and their coworkers have been enjoying a brief run of peace, quiet, and optimizing the theorems that allow for teleportation and camouflage. Everything is within parameters, until they get saddled with an intern who's convinced that he's God's gift to math and that their applications of topology are illusory. A rebellion is brewing - but bigger problems are afoot. Their old enemy, the Master of Ravens is back, and has teamed up with a mercenary with a grudge over the Center’s recent disruption of a profitable contract. Together, the two are planning on taking out the Center - and everyone in it!