Martyn Demas has always enjoyed knock-knock jokes and over time kept a notebook where he wrote down some of his own ideas for these kinds of jokes. This is a compilation of 101 of the best that he could come up with so far. According to Martyn, he hopes that these jokes would give you just as much enjoyment as he had in thinking them out. If you enjoy jokes, please take a look at Martyn Demas' other book: Knock-Knock Jokes About Names: 101 Clean and Witty Knock-Knock Jokes About People's Names. Please note that this book will not be suitable for younger readers, as most of the words will not be in their vocabulary yet.