 Titles included 'Pip And Wilfred Detectives', 'Over The Edge Of The World', 'The Six-Armed Image', 'The Castaways', 'Ups And Downs', 'Popski's Early Life', 'Wilfred's Nightmare', 'Wilfred's Wonderful Adventures' and 'Trouble In The Nursery'.None appear to be currently available in any format.An early book was Pip, Squeak & Wilfred, Their "Luvly" Adventures, issued in 1921 by Stanley Paul & Co, London.