LEGO ELVES: Quest for the Keys by Stacia Deutsch
Welcome to Elvendale . . . When Emily Jones was walking through her grandmother's garden, she never dreamed she would end up in another world. But after crossing through a secret portal, Emily finds herself in Elvendale, the land of the elves . . . with no way to leave! Luckily, she meets the elves of fire, earth, wind, and water. Together they set off on a quest to find four legendary keys that have the power to open the portal to Emily's world. But it will take imagination and courage for them to succeed as they encounter riddles, talking animals and powerful magic on their way. Can they unlock the mystery and get Emily back home?