Ginny Morris and Mom's House, Dad's House by Mary Collins Gallagher
Appropriate for Tween/Teen market. Ginny Morris is in the fourth grade and her parents have been divorced for two years. She goes back and forth between her mother's apartment and her father's house, switching each Sunday (switch day). Ginny's character is smart, spunky, and a bit precocious, with a wry sense of humor. Children in shared custody arrangements have to cope with many practical as well as emotional challenges and Ginny confronts and encounters most of them.