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「幸好妳離嫁人還有段時間,那麼就慢慢回憶、慢慢尋找,在謎底揭曉前,不必把自己逼得太緊。妳知道嗎?『費馬最後定理』可是懸宕了360年才得到完美證明。」

北海道的雪從十一月底開始下,旭川正式邁入漫長的冬季,正太郎與櫻子小姐的關係也暫時停擺。就在這時,正太郎接到鴻上百合子的電話,想委託櫻子小姐調查阿姨家的貓離奇死亡的真相……

某個午後,鴻上在紅茶館巧遇櫻子小姐,兩人因此熟稔起來。鴻上的奶奶生前曾說過,當鴻上出嫁時,要送她一幅爺爺的畫,可惜這個答案已隨奶奶逝去永遠塵封。三幅畫裡都藏著珍貴的回憶,櫻子小姐能猜出是哪一幅,代替奶奶把祝福傳給鴻上嗎?

秋日將盡,正太郎和櫻子小姐趕在下雪前到森林進行田野調查,導師磯崎也跟他們同行。來到郊外,一行人竟看到本該消失在十一月的黑蔭蝶正在吸食野兔的屍體。蝴蝶彷彿捎來不祥的預感,磯崎隨後接到電話,得知過去曾教過的一名女學生失蹤了!在兩人的追問下,磯崎緩緩道起往事……秋去冬來,十一月的蝴蝶將揭發過去的懸案!

256 pages, Paperback

First published February 25, 2014

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Shiori Ota

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533 reviews16 followers
March 10, 2024
第四顆星給即將入冬的北海道。
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