First entry in a new series with four big all new linked novellas from multiple best-sellers Harry Turtledove, John Ringo & Jody Lynn Nye, S.M. Stirling, and Michael Z. Williamson! After the extinction asteroid DOESN’T strike Earth, the dinosaurs keep evolving – but so do the mammals. We mammals have achieved human-like shapes, but now it’s cold-blooded, magic-using reptiles against the hot-blooded, hot-tempered descendants of cats.