The Alexander Romance is an account of the life and exploits of Alexander the Great. Of uncertain authorship, it has been described as "antiquity's most successful novel". The book describes Alexander the Great from his birth, to his succession of the throne of Macedon, his conquests including that of the Persian Empire, and finally his death. Although constructed around a historical core, the book is mostly fantastical, including many miraculous tales and encounters with mythical creatures, such as sirens or centaurs. In this context, the term romance refers not to the meaning of the word in modern times but in the Old French sense of a novel or roman, a "lengthy prose narrative of a complex and fictional character".