The Great Fairy Tale Disaster and The Great Nursery Rhyme Disaster by David Conway

Conway, David. The Great Fairy Tale Disaster. Wilton: Tiger Tales, 2012. 32p.

Conway, David. The Great Nursery Rhyme Disaster. Wilton: Tiger Tales, 2009. 32p.
  
In The Great Fairy Tale Disaster, the Big Bad Wolf grows tired of his own fairy tale and tries to enter other tales, causing chaos. This book would make a fun introduction or conclusion to fairy tale units! 

For a similar story pertaining to nursery rhymes instead, read The Great Nursery Rhyme Disaster, in which Little Miss Muffet grows restless and invades other rhymes, wreaking havoc on the nursery rhyme world.