Alexander the Great contains elements commonly found in fiction. The chronological re-creation of events constitutes a well constructed plot in which one event depends upon another, with plenty of suspense to maintain the reader's interest. The defeat of the Persian Empire and the destruction of Persepolis serve as the climax, with the action gradually declining as Alexander pushes into India. When his men refuse to march through the Himalayas, the mighty mountains symbolize the end, and a sense of foreboding permeates the narrative. Indeed, Alexander will never see Greece again.

This unusually well-written biography features a mature but clear style that employs a precise vocabulary. Mercer gives credit to his ancient sources and points out their differences. He strives to relate only the facts, mentioning little about myths and legends.