倒叙推理或反叙式侦探小说(英语：Inverted detective story),也叫howcatchem（How catch them，意：如何抓到他们），就如同“叙述性诡计”一样，是一种推理小说的叙事手法。

通常凶手在这种故事的一开始就被揭露，看点是看侦探是如何抓到凶手。这类故事通常会以凶手视角展开，犯人将先实现一宗完美犯罪。等侦探登场后，再通过各种蛛丝马迹查明真相、抓到犯人。由于破案关键一定会在故事前半段的犯罪过程中，经由叙述充分展示给读者知晓，因此倒叙推理也被视为「最公平的解谜推理」。

虽然爱伦·坡曾写过倒叙形式的犯罪​​故事《黑猫》和《泄密的心》。

An inverted detective story, also known as a "howcatchem", is a murder mystery fiction structure in which the commission of the crime is shown or described at the beginning, usually including the identity of the perpetrator. The story then describes the detective's attempt to solve the mystery. There may also be subsidiary puzzles, such as why the crime was committed, but those are cleared up along the way. This format is the opposite of the more typical "whodunit", where all of the details of the crime and the perpetrator are not revealed until the story's climax.