The chapter introduces the form of the list as a tool for meaning-making and emphasizes the central role that different conceptions of knowledge play in creating and decoding lists. It argues that enumerative structures offer themselves as an entry point to examine how readers make sense of texts because those structures put on display the gaps and blanks that have to be filled in the reading process. It proposes to combine insights from (cognitive) narratology, new formalism, and reception theory to examine how lists work within the genre of detective fiction. The introduction provides a review of list-related publications and proposes a working definition of the central term “list” that is based on a prototype model.