If on a winter's night a traveler (Se una notte d'inverno un viaggiatore) is a novel published in 1979 by Italo Calvino and translated into English by William Weaver in 1981.

This book is about a reader trying to read a book called If on a winter's night a traveler. Every odd-numbered chapter is in the second person, and tells the reader what he is doing in preparation for reading the next chapter. The even-numbered chapters are all single chapters from whichever book the reader is trying to read.