To mark its 30th anniversary, this is a new volume of the hilarious dictionary of 'things that there should be words for but aren't'. For example, Birtle - to make something worse by trying to improve it, or Hinton Waldrist - one who persistently returns to a subject no one else is interested in. For more than ten years, John has been squirreling away new examples of this delightful genre and has now enlisted the help of Douglas Adams's friends and relations to help him collate a new collection.