To save her friends and her town from dark magic, Emma must crack her most complex puzzle yet in this exhilarating finale of the Codebreakers trilogy.

The Division has stolen all of Sablewood's magical artifacts?and the Codebreakers blame Emma for it. Desperate to save both Sablewood and her friendships, Emma enlists the help of some unlikely allies and discovers that there's one final artifact left to find that contains the key to all of Sablewood's magic. But the code that leads to this key is so complex that she can't solve it alone. As the spirits of Sablewood rise and destruction looms, Emma will have to repair her friendships and use all of the Codebreakers' combined knowledge to solve one last riddle, find the key, and end the Division forever.

Filled with puzzles, mystery, and adventure, The Relic Key Riddle is the spellbinding conclusion to one girl's quest to save the world?and protect her friends along the way.