It's the funniest, most gigantic book of knock-knocks ever! Arranged from A-Z, there are over 250 pages filled with over one thousand sidesplitting jokes and comic drawings that will keep your children and their friends in stitches: knock knock!; Who's There?; Franz!; Franz Who?; Franz, Romans, Countrymen...; Knock Knock!; Who's There?; Celia!; Celia Who?; Celia later alligator...; Knock Knock!; Who's There?; Freddie!; Freddie Who?; Freddie or not, here I come..