Que sais-je?

", ISSN 0768-0066) is an editorial collection published by the Presses universitaires de France (PUF).

Started in 1941 by Paul Angoulvent (1899–1976),[1] founder of the Presses Universitaires de France, the series now numbers over 3,900 titles by more than 2,500 authors, and various volumes, taken all together, have been translated into more than 43 languages.

The range of subjects is truly encyclopedic, covering everything from chanson de geste and Homer to gastronomy and free will.

[3] The presentation of information is varied and may consist of an introduction to a subject, a detailed essay on a school of thought, or an analysis of current events.

Sometimes this updating involves a complete re-writing of the book, as for example Parfumerie[4] (volume 1888): originally written by Edmond Roudnitska in 1980 and re-written by Jean-Claude Ellena in 2006, but keeping the same number within the series.