All-Consuming Fire Wildthyme and Friends Investigate" from Obverse Books. Holmes' creator Arthur Conan Doyle appears in the Virgin Missing Adventures novel "Evolution" by John Peel, where it is implied that he based some elements of the fictional Holmes on the Fourth Doctor. As well as Sherlock Holmes, the novel includes appearances by Sherlock's older brother Mycroft, who first appeared in "The Adventure of the Greek Interpreter", and another yet older brother, Sherringford (sic) along with a cameo from their father, Siger (Siger and the similarly named Sherrinford were invented by Holmesian scholar William S. Baring-Gould to resolve an apparent contradiction in the
Mycroft Holmes [...] the most indispensable man in the country." He apparently serves as a sort of human computer, as stated in "The Bruce-Partington Plans": Mycroft appears or is mentioned in four stories by Doyle: "The Greek Interpreter", "The Final Problem", "The Empty House" and "The Bruce-Partington Plans". While he does occasionally exert himself in these stories on behalf of his brother, he on the whole remains a sedentary problem-solver, providing solutions based on seemingly no evidence and trusting Sherlock to handle any of the practical details. In fact, Mycroft's own lack of practicality is a severe handicap despite his inductive talents: