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Issues
- #1 #1 The Secret of Whale Island April 2013
- #2 #2 Revenge of the Lizard Club July 2013
- #3 #3 The Treasure of the Viking Ship April 2014
- #4 #4 Catching the Giant Wave [September] 2014
- #5 #5 The Secret of the Waterfall in the Woods [February] 2016
- #6 #6 The Thea Sisters and the Mystery at Sea [October] 2016
- #7 #7 A Song for the Thea Sisters March 2017
- #8 #8 The Thea Sisters and the Secret Treasure Hunt December 2017