From publisher blurb: Within Dinosaur Companions... We introduce 25 new dinosaurs (and pterosaurs and a crocodilian) to choose from to be your new best friend! Every dinosaur can be an animal companion/mount or familiar! 15 of these prehistoric pals are animal companions/mounts: Argentinosaurus, Baryonyx, Concavenator, Corythosaurus, Deinocherius, Dilophosaurus, Dracorex, Excaliborsaurus, Maiasaura, Neptunidraco, Scipionyx, Stygimoloch, Tethyshadros, Tupandactylus, and Utahraptor! 10 of them are familiars: Coelophysis, Jinfengopteryx, Leaellynasaura, Mei, Micropachycephalosaurus, Microraptor, Nyctosaurus, Parvicursor, Scansoriopteryx, and Sordes! Also featured are 6 mini prehistoric encounters to spice up a campaign!