by Mary Downing Hahn
This book starts off as seventh-grader Logan Forbes learns that a murder had been committed in his family's new house three years earlier. Myrtle Donaldson, a bookkeeper accused of embezzling from the local amusement park, was found dead in her ransacked house and her killer is still at large. Logan's next-door neighbor, Arthur Jenkins, a sixth grader with a bottomless stomach and a quirky personality, is convinced that Mrs. Donaldson was falsely accused, and he wants Logan to help him find the real perpetrator.
This is an enjoyable mystery with just the right amount of frightening and dangerous elements. Logan is a great character — a new kid in town trying to find his place, almost immediately befriended by someone on the lowest rung who turns out the be the right friend for him.