Thomas Peckett Prest, also known as Thomas Preskett Prest, was a British hack writer, journalist and musician. He was a prolific producer of penny dreadfuls. He is now remembered as the co-creator with James Malcolm Rymer of the fictional Sweeney Todd, the 'demon barber' immortalized in his The String of Pearls. He has also been associated with the authorship of Varney the Vampire, now more often thought to be the work of Rymer. He wrote under pseudonyms including Bos, a takeoff of Charles Dickens' own pen name, Boz. Before joining Edward Lloyd's publishing factory, Prest had made a name for himself as a talented musician and composer.