The Bio of a Space Tyrant series is a six-book science-fiction series by Piers Anthony based within the solar system. The series revolves around the character Hope Hubris and his family. It charts Hope's ascent from poor Hispanic refugee to President of Jupiter. It is considerably more adult-themed than many of Anthony's earlier works.

The novels exist in a future several hundred years distant at a point where the nations of Earth have expanded into and filled the solar system. Various planets, moons and asteroids within the solar system have political, religious and geographical affiliations similar to those on present-day Earth. Many events in the series parallel modern-day situations; for instance, Mars is controlled by the countries formerly comprising the Middle East, and they have the largest supply of iron, which is the primary fuel in Anthony's universe. Ganymede parallels Cuba, and has a Communist government allied with Saturn's, which corresponds with Russia, and a "missile crisis" is an event in the series. Many other such correspondences abound.

The series is presented as a first-person autobiography of Hope Hubris, and the broad strokes of his life are painted from the earliest pages, including his status as a perceived tyrant and womanizer. It is clear from the introductions and epilogues that Hope died before the publication of his memoirs and that his career as military man, politician, executive and statesman was greatly misunderstood by the public, most notably his various affairs with women, which are a major focus of the series.