Betty G. Birney 
Mysteries According to Humphrey 

To celebrate his tenth birthday the whole Humphrey series has a smart new livery, repositioning him alongside perennial favourites such as Winnie-the-Pooh and Paddington.When Humphrey's teacher, Mrs Brisbane, doesn't come to school, he is unsqueakably worried. Then a supply teacher, the mysterious Mr E, arrives and everything changes. Class is fun, but are Humphrey's classmates learning anything? And what had happened to their wonderful teacher?Humphrey has his paws full as he tries to gather clues to solve the mystery, and then, on Halloween, everything is revealed . . .Praise for Humphrey:'An effective exploration of the joys and pains of making and keeping friends, which will strike a chord with many children.'Daily Telegraph'A charming, feel-good tale.'Irish Times'Humphrey's matter-of-fact, table-level view of the world is alternately silly and profound and Birney captures his unique blend of innocence and earnestness.'Publisher's Weekly'Humphrey, a delightful, irresistible character, is big hearted, observant and creative.'Booklist