The Case of the Dead Mouse is one of a series of mysteries that is solved using logic and mathematical deduction. A school bully is trying to frame Jason for a dastardly deed. The reader joins Bella and Rachel, using mathematical and logical reasoning, to expose the culprit. This mystery is a fun way to develop young students’ ability to make logical deductions, a skill critical to success in math, computer programming and STEM subjects in general. But it does so in a way that discusses the issues of bullying and how young people can defend themselves from cruelty and abuse. The story blends math and logic with the frustrations and fears children experience regarding bullying in a way that is engaging and empowering. Logical reasoning is the key skill in developing future computer programmers, software developers and innovators.