Book-length treatments of behaviorism from a philosophical and historical perspective are few in number. Tilquin's (1942) is one of these, but its publication in French during World War II and the limited number of available copies make for difficult access. In this paper, I summarize the contents of the book for a general audience of behavior analysts. Tilquin's work is a useful tour of the behaviorism of its time, and most of the topics discussed in it remain relevant to behavior analysis. The table of contents for the book is appended. (Contains 6 footnotes.)