故事主角是國小老師楓，她的爺爺是一位退休且熱愛推理小說的前校長。爺爺擁有卓越的邏輯推理能力，雖然因失智症偶爾出現幻視，但仍能與楓一同破解各種離奇案件。兩人以祖孫師徒的身份，展開一場充滿謎團的偵探冒險。小說中的主線案件包括密室殺人、失蹤懸案和數字謎題，故事情節緊湊又細膩，融合了親情、心理描寫及經典推理元素。作者巧妙將生活細節與推理解謎交織，展現出陪伴和理解的重要性。本作被譽為“治癒系推理”，不僅著重案件本身，更強調家人間的關係與心靈成長。故事中經常致敬推理巨匠阿嘉莎·克莉絲蒂、吉爾伯特·凱斯·契斯特頓與埃德加·愛倫·坡的經典作品。這本書在日本熱銷超過二十萬冊，深受喜歡溫馨又刺激懸疑故事讀者的喜愛。There used to be a cafe called Mon Cheri at Nishi Waseda where members of the Waseda Mystery Club spent day after day frothing in excitement over the latest mystery novels, and now he and Kaede solve mysteries together . . .As a lover of classic crime stories, it’s perhaps no surprise that twenty-seven-year-old schoolteacher Kaede encounters everyday mysteries more often than your average person. Solving them is another matter, though, and the person she always heads to for guidance is her beloved grandfather – who, despite having dementia, retains a keen sharpness of mind. From impossible locked-room murders to confounding missing person cases, the granddaughter and grandfather team ‘wea
