Silo is a series of post-apocalyptic science fiction books by American writer Hugh Howey. The series started in 2011 with the short story "Wool", which was later published together with four sequel novellas as a novel with the same name. Along with Wool, the series consists of Shift, Dust, three short stories, and Wool: The Graphic Novel. The series has also been adapted as a comic book and an Apple TV+ television series, and has an extensive fanfiction following.

Hugh C. Howey is an American writer, known best for the science fiction series Silo, part of which he published independently through Amazon.com's Kindle Direct Publishing system; he later signed distribution deals, with large publishing houses in different countries, but maintains the publishing rights and all e-book publishing.