Over four deadly trials on the island of Mataquin, North and Rosie must steal four amber mosaics which are also the final pieces in Tan's deadly endgame to awaken the legendary and mythical power of the Amber Room. With the threat of The End Book still hanging over them and those they love; Rosie and North must battle other thieves and fairies to stay alive and win through the trials. Battling Dragons and Shadows is hard enough, but when an arranged marriage forced upon them by the rites of ancient fairy lore comes to light, it threatens to tear apart their partnership forever. North and Rosie must prevail and buy time enough for the spies of the Ange Gardien to breach the powerful enchantments that shield the land of Rosie's birthplace, the land of the three moons, and deliver the vital chain message, that could change their fate and that of the known universe. Welcome to The Thief Trials...