The Owl Tree is a novella by Jenny Nimmo which was released in 1997. The story is about a boy, Joe, who tries to save an owl tree which his grandmother Granny Diamond is fond of and her neighbour, Mr Rock, intends to cut down.
While their Mum is in the hospital and expecting a baby, Joe and his sister Minna are taken to their Granny Diamond's house, as no one else is able to take care of them at this time, because their parents are in the hospital. After showing Joe his room, Granny Diamond tells him about an owl tree outside the house which grows in her neighbour Mr Rock's lawn. She tells him how she had once seen an owl perched on one of the branches of the tree one night and it had cheered her up, which is why she calls it the owl tree. Then one day Joe finds out that Mr Rock is going to cut down the tree soon and after that, Joe tries to find a way to save the tree, as its cutting down could affect his Granny Diamond greatly if it happened.