A librarian's mobile book service becomes the scene of a murder, forcing her and her secret feline co-pilot to unearth a killer before her project is permanently closed. Minnie Hamilton, dedicated to spreading literacy via her bookmobile in Chilson, Michigan, faces the potential loss of her beloved project due to funding issues. Her situation worsens when a volunteer is found dead along the bookmobile's route, initially ruled an accident but increasingly appearing to be murder. With her job and the bookmobile's future at stake, Minnie, aided by her rescue cat Eddie, must identify the murderer before the investigation closes the final chapter on her endeavors.

The premise sets up a classic cozy mystery with a charming protagonist and a unique setting centered around a bookmobile. The inclusion of a secret cat companion adds a whimsical element often found in the genre. The narrative appears to focus on amateur sleuthing within a close-knit community, where the protagonist must balance personal stakes with solving a crime. The pacing is likely to be steady, building suspense as clues are uncovered and the threat to Minnie's project looms.