High Quality Content by WIKIPEDIA articles! The Last Theorem is a 2008 science fiction novel written by Arthur C. Clarke and Frederik Pohl. It was first published in the United Kingdom by HarperVoyager in July 2008, and in the United States by Del Rey Books in August 2008. The book is about a young Sri Lankan mathematician who finds a short proof of Fermat`s Last Theorem, while an alien invasion of Earth is in progress.