Complex sentence: Robert Heinlein picked up the idea in his novel "The Moon is a Harsh Mistress", those Irregulars carried out similar surveillance in the run-up to a revolution, working for a computer named Mycroft, named after Sherlock Holmes' older smarter brother.
Split into simpler sentences: Robert Heinlein picked up the idea in his novel "The Moon is a Harsh Mistress". Those Irregulars carried out similar surveillance in the run-up to a revolution, working for a computer named Mycroft, named after Sherlock Holmes' older smarter brother.