Professor Gustous R Thripsted authored Flora and Fauna of the Universe, a guidebook mentioned by the Fourth Doctor. It discussed the true nature of the Usurians. (TV: The Sun Makers) As a youth, the Doctor had read an abridged version of this work. (PROSE: Lungbarrow)

He was also the author of Genetic Politics Beyond the Third Zone, which had an entry on the Time Lords and discussed the Eighth Man Bound game. (PROSE: Christmas on a Rational Planet) Another entry in the book concerned Faction Paradox. (PROSE: Alien Bodies) In the entry for the Voord, he speculated that they were the ancestors of the Remote and that they were the subjects of a Faction Paradox experiment. (PROSE: Interference - Book Two)

Thripsted co-wrote Introduction to Quantum Esotericism with Watkinson. This book discussed the Faction Paradox text known as the Book of Lies. (PROSE: Unnatural History)

At some point before 3999, he wrote Guide to Having Fun in the Milky Way, in which he stated that Micawber's World was "one of the most sought after holiday locations in the galaxy". (PROSE: Placebo Effect)

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