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推理的時間到了！
回歸原點，展現出本格推理最大樂趣的企畫小說！
你知道推理小說的祕密嗎？
推理小說的每個「謎團」都由三個基本元素組成，
那就是「WHODUNIT（凶手）」、「WHYDUNIT（動機）」、「HOWDUNIT（詭計）」，
古今以來的作家們，以這三者為地基，打造出數不清的故事風貌。
本書中，日本講談社與推理作家法月綸太郎攜手合作，
邀請六位作家挑戰推理的原點樂趣，以「猜凶手」、「猜動機」、「猜詭計」譜寫出精采短篇，
同時承擔重責大任──每則故事都有【致讀者的挑戰書】的環節，
他們還要扮演讀者，解開彼此謎團的真相！
所有答案都安排在本書最後，
務必欣賞六位創作者的故事及解題──
好的作家，會是好的偵探嗎？
由您親眼見證！
✔WHODUNIT．猜凶手篇
法月綸太郎〈由於嫌犯死亡〉：
妻子罹患絕症，溝口高則想讓妻子解脫，卻不忍下手，於是委託毫無關係的梶谷航平代為動手；
而他付出的代價，是協助梶谷殺害養父，奪取高額保險金──
這是警方推測的真相。然而，偵探綸太郎認為這起「交換殺人」的案件背後另有故事……
方文貴惠〈封谷館殺人事件〉：
用女僕身分潛入大宅盜畫的小偷走了衰運，不幸撞見嗜槍如命的大宅主人死亡，
殺人事件接連不斷，對外道路還被切斷，僅剩的自救方式唯有解開殺人謎團！
✔WHYDUNIT．猜動機篇
我孫子武丸〈太過年幼的目撃者〉：
四歲男孩小昴就快有新妹妹了，但剛產檢回家的媽媽突然失控，
居然對爸爸下手，釀成悲劇。媽媽到底怎麼了？
田中啓文〈培里之墓〉：
美國人培里奉命率艦前往日本，強硬瓦解了幕府的鎖國政策，史稱「黑船來襲」。
但在這段歷史背後，其實還有另一段不為人知、關於培里殺人的祕密……
✔HOWDUNIT．猜詭計篇
北山猛邦〈屠龍勳章〉：
為了打開祖父的保險箱，一對兄妹回溯二戰暗殺案，
在一輛疾行通往戰場的危險列車中，究竟是誰阻止了一場血腥災難？
伊吹亞門〈波戶崎大尉的名譽〉：
遠在滿州國，偵探月寒三四郎受託調查一起軍隊內部告發案，
卻遇上嫌犯在冰天雪地的醫療密室中憑空消失的離奇事件。
【六位作家參加企畫的心得（爆料）】
我在Howdunit篇吃下了二連敗。
──法月綸太郎
我發現想寫出更精鍊的推理小說，
只要請一流的推理作家幫忙推理，
再利用答案來精進自己的作品就行了。
──北山猛邦
請各位一併欣賞我煩惱了將近一個月，
靈光乍現後特地加上底線強調、自信滿滿寫出的離譜推理。
──伊吹亞門
我一開始並沒有仔細閱讀短篇邀稿的企畫書。
──我孫子武丸
衷心希望這個企畫今後持續，
讓那些沒有事先仔細確認邀稿內容的推理小說家
嘗嘗緊臨截稿日前手忙腳亂的慌張滋味。
──田中啓文
第一次聽到這個企畫時，我心裡極度不安，
擔心自己能不能當個稱職的出題者。
連續好幾天都睡不好，應該稍微瘦了一些。
──方丈貴惠
┏━━━━━━━━━━━━━━━┓
┃這些作家，會是好的偵探嗎？ ┃
┃嗯……或者，你會是更棒的偵探？┃
┃☑加入戰局，由「你」解開謎團！┃
┃☑放棄癱平，直接閱讀真相 ┃
┃你──是哪一種推理讀者呢？ ┃
┗━━━━━━━━━━━━━━━┛
你知道推理小說的祕密嗎？
推理小說的每個「謎團」都由三個基本元素組成，
那就是「WHODUNIT（凶手）」、「WHYDUNIT（動機）」、「HOWDUNIT（詭計）」，
古今以來的作家們，以這三者為地基，打造出數不清的故事風貌。
本書中，日本講談社與推理作家法月綸太郎攜手合作，
邀請六位作家挑戰推理的原點樂趣，以「猜凶手」、「猜動機」、「猜詭計」譜寫出精采短篇，
同時承擔重責大任──每則故事都有【致讀者的挑戰書】的環節，
他們還要扮演讀者，解開彼此謎團的真相！
所有答案都安排在本書最後，
務必欣賞六位創作者的故事及解題──
好的作家，會是好的偵探嗎？
由您親眼見證！
✔WHODUNIT．猜凶手篇
法月綸太郎〈由於嫌犯死亡〉：
妻子罹患絕症，溝口高則想讓妻子解脫，卻不忍下手，於是委託毫無關係的梶谷航平代為動手；
而他付出的代價，是協助梶谷殺害養父，奪取高額保險金──
這是警方推測的真相。然而，偵探綸太郎認為這起「交換殺人」的案件背後另有故事……
方文貴惠〈封谷館殺人事件〉：
用女僕身分潛入大宅盜畫的小偷走了衰運，不幸撞見嗜槍如命的大宅主人死亡，
殺人事件接連不斷，對外道路還被切斷，僅剩的自救方式唯有解開殺人謎團！
✔WHYDUNIT．猜動機篇
我孫子武丸〈太過年幼的目撃者〉：
四歲男孩小昴就快有新妹妹了，但剛產檢回家的媽媽突然失控，
居然對爸爸下手，釀成悲劇。媽媽到底怎麼了？
田中啓文〈培里之墓〉：
美國人培里奉命率艦前往日本，強硬瓦解了幕府的鎖國政策，史稱「黑船來襲」。
但在這段歷史背後，其實還有另一段不為人知、關於培里殺人的祕密……
✔HOWDUNIT．猜詭計篇
北山猛邦〈屠龍勳章〉：
為了打開祖父的保險箱，一對兄妹回溯二戰暗殺案，
在一輛疾行通往戰場的危險列車中，究竟是誰阻止了一場血腥災難？
伊吹亞門〈波戶崎大尉的名譽〉：
遠在滿州國，偵探月寒三四郎受託調查一起軍隊內部告發案，
卻遇上嫌犯在冰天雪地的醫療密室中憑空消失的離奇事件。
【六位作家參加企畫的心得（爆料）】
我在Howdunit篇吃下了二連敗。
──法月綸太郎
我發現想寫出更精鍊的推理小說，
只要請一流的推理作家幫忙推理，
再利用答案來精進自己的作品就行了。
──北山猛邦
請各位一併欣賞我煩惱了將近一個月，
靈光乍現後特地加上底線強調、自信滿滿寫出的離譜推理。
──伊吹亞門
我一開始並沒有仔細閱讀短篇邀稿的企畫書。
──我孫子武丸
衷心希望這個企畫今後持續，
讓那些沒有事先仔細確認邀稿內容的推理小說家
嘗嘗緊臨截稿日前手忙腳亂的慌張滋味。
──田中啓文
第一次聽到這個企畫時，我心裡極度不安，
擔心自己能不能當個稱職的出題者。
連續好幾天都睡不好，應該稍微瘦了一些。
──方丈貴惠
┏━━━━━━━━━━━━━━━┓
┃這些作家，會是好的偵探嗎？ ┃
┃嗯……或者，你會是更棒的偵探？┃
┃☑加入戰局，由「你」解開謎團！┃
┃☑放棄癱平，直接閱讀真相 ┃
┃你──是哪一種推理讀者呢？ ┃
┗━━━━━━━━━━━━━━━┛
368 pages, Paperback
Published August 6, 2026
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Displaying 1 - 1 of 1 review
July 24, 2025
Rintaro Norizuki - Due to the Death of the Suspect:
Fairly different from the typical guess-the-culprit stories, there's no real, elimination by evidence, but instead Rintaro noticing something odd and extrapolating from there. I liked it though, and its another variation on the exchange murder plot that Norizuki likes to do so much.
Houjou Kie - The Whodani Manor Murders:
Def the stand-out story for this collection, very Queenian, I like the clues and the deductions made from them, just a very fun story that is good at what it's going for, being clever.
Takemaru Abiko - The Witness Was Too Young:
Abiko talks in the afterword about how he feels a whydunit doesn't really work in a guess-the-culprit format, and yeah, I have to agree with him lmao. I tend to just assosciate these with a process-of-elimination, which doesn't really work for them. All that aside, I like the central idea of the motive, even if it's heavily reliant on coincidence.
Hirofumi Tanaka - Perry's Grave:
The only author from either book who I hadn't read before. A pretty decent historical mystery, but I feel that you can luck into the solution without any real deductions, similar to the prior one. Solidly written though.
Kitayama Takekuni - The Dragonslayer's Medal:
Again, the guess-the-culprit format is weird for howdunits, because there's not much process of elimination going on. Forgoing that, the trick in this story isn't as grand as most of the other Kitayama stuff I've read, but it's still fairly surprising, and well-foreshadowed.
Ibuki Amon - Captain Hatosaki's Honor:
The howdunit here was alright, but my eyes were definitely glazed while some stuff was being explained. The motive, on the other hand, was really cool, and it led for a really dark ending.
Fairly different from the typical guess-the-culprit stories, there's no real, elimination by evidence, but instead Rintaro noticing something odd and extrapolating from there. I liked it though, and its another variation on the exchange murder plot that Norizuki likes to do so much.
Houjou Kie - The Whodani Manor Murders:
Def the stand-out story for this collection, very Queenian, I like the clues and the deductions made from them, just a very fun story that is good at what it's going for, being clever.
Takemaru Abiko - The Witness Was Too Young:
Abiko talks in the afterword about how he feels a whydunit doesn't really work in a guess-the-culprit format, and yeah, I have to agree with him lmao. I tend to just assosciate these with a process-of-elimination, which doesn't really work for them. All that aside, I like the central idea of the motive, even if it's heavily reliant on coincidence.
Hirofumi Tanaka - Perry's Grave:
The only author from either book who I hadn't read before. A pretty decent historical mystery, but I feel that you can luck into the solution without any real deductions, similar to the prior one. Solidly written though.
Kitayama Takekuni - The Dragonslayer's Medal:
Again, the guess-the-culprit format is weird for howdunits, because there's not much process of elimination going on. Forgoing that, the trick in this story isn't as grand as most of the other Kitayama stuff I've read, but it's still fairly surprising, and well-foreshadowed.
Ibuki Amon - Captain Hatosaki's Honor:
The howdunit here was alright, but my eyes were definitely glazed while some stuff was being explained. The motive, on the other hand, was really cool, and it led for a really dark ending.
Displaying 1 - 1 of 1 review