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 Originial Encyclopedia ISBN 978-0-7864-0591-6 Supplement 1 ISBN 978-0-7864-1166-5 Supplement 2 ISBN 978-0-7864-1518-2 Supplement 3 ISBN 978-0-7864-2295-1 Supplement 4 ISBN 978-0-7864-3241-7 Supplement 5 ISBN 978-0-7864-4187-7 Supplement 6 ISBN 978-1-4766-6548-1 Supplement 7.