He was a rascal and a muckraker, a professional irritant, and when writing was not enough, he ran for office. An avid Socialist, Uptain Sinclair seems to have been as large a character as those found in his works. Upton Sinclair: The Early Years offers more than two dozen books, plays and audiobooks in four curated collections. The app features a vintage edition of The Jungle, early works published by Sinclair himself, and an audio version of The Book of Life. Social activists and fiction fans alike will find something to inspire and admire in this collection of his early work.