Kaline Klattermaster's tree house

Third-grader Kaline Klattermaster's father has gone somewhere and his mother cannot seem to keep everything straight the way he did, but the two brothers and one hundred dogs that live in his imaginary treehouse, and his strange neighbor Mr. Osiris Putnaminski, help him cope with his father's absence, his mother's forgetfulness, and the bullies that torment him in school.