"With the last day of third grade fast approaching, Doug and Harry face their most difficult adventure yet: saying goodbye to each other. Song Lee and Mary are busy preparing an end-of-year present for their favorite teacher, Mrs. Flaubert, but their excitement can't distract Doug from Harry's lack of interest. All Harry wants to talk about is his mysterious new neighbors. What does Harry have up his sleeve this time? Saying farewell to Room 3B is hard enough, but when more changes shake up Doug's world, will he be able to say his most horrible goodbye yet?"--Back cover.