Alien Citadel is written in a straightforward, third-person style. Although the focus is on Finn, the narrative sometimes shifts from his point of view. Within most of the chapters, scenes of what he is doing and thinking are interspersed with those of Baer and the warrior band members as they struggle through dangerous terrain to reach Finn. Finn's thoughts and memories are revealed occasionally, but those of the other characters are revealed only through their actions and words.

Action, dialogue, and description are well balanced in each chapter. Events flow smoothly, making for easy reading and comprehension. Characters' speech patterns are distinctive: Baer uses slang and often leaves off the "g" in words, and the villain Cacinnix speaks with excessive poise and formality. Generally, style is subordinated to the telling of a rousing tale, however.

There is one oddity in the book's format: the first line...