Proof is an American comic book series, published by Image Comics and created by writer Alex Grecian and artist Riley Rossmo. The story concerns John "Proof" Prufrock, a sasquatch, who works for a secret government organization. He hunts cryptids with his partner, Ginger Brown, and seeks clues to his past. The book was influenced by The X-Files and Tarzan.

Alex Grecian is an American author of short fiction, novels, comic books, and graphic novels. His notable works include the comic book series Proof and the novels in the Scotland Yard's Murder Squad series: The Yard, The Black Country, The Devil's Workshop, The Harvest Man, Lost and Gone Forever, and The Blue Girl. He has been nominated for the Strand Award for Best Debut Novel for The Yard, The Dilys Award for The Black Country, and the Barry Award for Best First Novel for The Yard. He was also the recipient of an Inkpot Award in 2018 and of the Kansas Notable Book Awards from the State Library of Kansas for The Yard, The Black Country, and The Devil's Workshop.