Book excerpt: Our knowledge of Alexander the Great is derived from the widely varying accounts of five authors who wrote three and more centuries after his death. The value of each account can be determined in detail only by discovering the source from which it drew, section by section, whether from a contemporary document, a memoir by a companion of Alexander, a hostile critique or a romanticizing narrative. In this book the three earliest accounts are studied in depth, and it becomes apparent that each author used more than one source, and that only occasionally did any two of them or all three use the same source for an incident or a series of incidents. This book will be of value to ancient historians and of interest also to those studying Alexander the Great.