Author

Books by Al Ries and Jack Trout

Al Ries and Jack Trout were advertising strategists and business writers who together developed the concept of positioning in the 1970s and went on to write several influential books on marketing strategy. Ries co-founded the consultancy Ries & Ries with his daughter Laura Ries and authored titles including Positioning, Marketing Warfare, and Focus. Trout, who passed away in 2017, founded Trout & Partners and wrote Differentiate or Die and Repositioning. Together they were among the most cited marketing thinkers of the late twentieth century.