"Beast Companions does a tremendous service to paleontology now and in the future by collecting pertinent information about all of the animals that inhabited the Mesozoic Era alongside the dinosaurs. Many books are written about different groups of animals that lived during the Mesozoic, but few provide the reader with a comprehensive treatment of all the animals that coexisted across the globe. The book will be an important reference not only to paleontologists but to evolutionary biologists and more broadly to anyone interested in global ecosystems over time."—Matthew Bonnan, Stockton University

"Despite countless popular and technical books on dinosaurs, Foster finds a story that surprisingly has never been relayed to a wider audience, explaining in vivid detail the biological importance of the non-dinosaurian Mesozoic fauna and how their diversity in form and behavior rivaled (and in some cases exceeded) that of their charismatic reptile overlords. . . . It is a compact yet engrossing safari ride through the Mesozoic age of reptiles."—Adam Huttenlocker, University of Southern California