One book cover includes him on the cover with a lab coat and beakers. The cover may have been blue or purple. It was very block cartoonish. He solves mysteries with a girl who is also on the cover with a lab coat on. They may have had a dog. I believe they solved mysteries in their apartment complex or school. It was a series that may have been Scholastic as I believe I got it from a book fair as a child. The book would have been out in the early 2000s.