The book is the first monograph on the Bellum Alexandrinum for 80 years. It demonstrates that the Bellum Alexandrinum is heterogeneous with regard to its style, narrative technique, and the density and quality of the historical information. This suggests that the work is a conglutination of accounts by a number of different authors. The first section is likely to go back to Julius Caesar himself. The analysis sheds new light on the composition of the Corpus Caesarianum, the war of words preceding and following Caesar's assassination, and the development of Roman historiography in the first century B.C.