Here is the fourth supplement to Dinosaurs: The Encyclopedia, a 1998 American Library Association Outstanding Reference Book (ARBA called it "a reference legend...lavishly illustrated, cleverly written, and extraordinarily comprehensive"). This volume updates the concepts discussed in the encyclopedia and its earlier supplements. It includes a discussion of the Mesozoic Era, covers recent discoveries in paleontology, and furthers the ectothermy/endothermy debate from previous installments. It also offers lengthy sections on dinosaurian schematics and genera and updates the encyclopedia's list of excluded genera. Appendices discuss Pterosaurs and Mesozoic birds, and a glossary is included to aid students and scientists alike. The extensive bibliography lists the most recent peer-evaluated paleontology literature. Supplemental volumes do not repeat information from earlier volumes, but build upon them:ISBN 978-0-7864-7222-2 Original EncyclopediaISBN 978-0-7864-0591-6 Supplement 1ISBN 978-0-7864-1166-5 Supplement 2ISBN 978-0-7864-1518-2 Supplement 3ISBN 978-0-7864-2295-1 Supplement 4ISBN 978-0-7864-3241-7 Supplement 5ISBN 978-0-7864-4187-7 Supplement 6ISBN 978-1-4766-6548-1 Supplement 7