The first text to provide in-depth coverage of all the major cephalopod taxa from a palaeobiological view, both extant and extinct, Paleobiology of Ammonoids and Their Relatives summarizes the state of knowledge of palaeobiology of this important group. This one-stop reference includes a number of key biological questions and debunks previously held wisdoms from more general invertebrate palaeontological works. The text showcases the contributions that studies have made to macroevolution and palaeobiology, inspiring the next generation of palaeontologists (students and practitioners) to explore the use of cephalopods as model organisms in their own studies.