The Ear Fairy - W.G. White - Bog

Mia and Jonathan are best friends, even if they're only pen pals. When Jonathan's class comes to visit, Mia is determined to make sure he has the best time ever! Only Jonathan's hearing aids go missing, and they believe it must be the tricksy Ear Fairy, sister to the Tooth Fairy, who has taken them! Can Mia and Jonathan find the missing hearing aids before Jonathan has to return home?