Original sentence: According to Terry Pratchett in the Discworld novel Thief of Time there is a fifth horseman: Ronnie Soak (Kaos spelled backwards).In collaboration with Neil Gaiman, Pratchett also refers to the four horsemen in the novel Good Omens, however, Pratchett and Gaiman exchange 'Pestilence' for 'Pollution' suggesting Pollution took over in 1928 when Pestillence left "muttering something about Penicillin".Mentioned in the Fever book series by Karen Marie Moning, to be four Unseelie Princes escaped from the Seelie Queen's prison on Halloween
Edited sentence: In Good Omens, the horseman of Pestilence is changed out for Pollution, suggesting Pollution took over in 1928 when Pestillence left "muttering something about Penicillin".In the Discworld novel Thief of Time, there a fifth horseman is mentioned: Ronnie Soak (Kaos spelled backwards).The horsemen are mentioned in the Fever series by Karen Marie Moning, and explained to be four Unseelie Princes escaped from the Seelie Queen's prison on Halloween