My Grandfather, the Master Detective

By: Masateru Konishi

Published by Penguin Group, 2026-03-17

<b>A Japanese <i>The Thursday Murder Club</i>, taking healing fiction for a mystery-filled spin with this Japanese bestseller that has sold more than 200,000 copies in Japan.</b><br><br><i>He’s not your average Grandpa.</i><br><br>As a lover of classic crime stories, it’s no surprise that schoolteacher Kaede encounters everyday mysteries more often than your typical twenty-seven-year-old.<br><br>Solving them is another matter, though. For that, she turns to her beloved grandfather, who retains a keen sharpness of mind despite his dementia, and who was once a key member of The Waseda Mystery Club. From impossible locked room murders to confounding missing persons cases, the grandfather-granddaughter duo "weave stories" to get to the bottom of every mystery. But all the while, an insidious shadow from Kaede’s past slowly closes in on her . . .<br><br>Steeped in references to classic crime from Christie to Chesterton to Poe, <i>My Grandfather, the Master Detective</i> plays with the genre, capturing readers' imagination in this Tokyo-set escapist mystery. Its charming characters and affectionate focus on relationships echo heartwarming Japanese titles such as <i>Before the Coffee Gets Cold</i>.