Renowned puzzle creator Pierre Berloquin has published more than 40 books on puzzles and games, translated into several languages. They include: Hidden Codes & Grand Designs , 150 Challenging and Instructive Puzzles : The Garden of the Sphinx , and 100 Games of Logic (all Sterling). As a consultant, he pioneered the use of encounter group techniques in creativity shops in the 1970s and applied it to businesses and research facilities in Europe and America. As an engineer, he developed innovative software, including his 1995 12 Screen Test Lab with touch-screen interfaces to assess Paris Transit Authority's employees. As a multimedia creator, he developed in 1984-85 the first video game with avatars ever to work on a network, which was exhibited for several weeks at the Centre Georges Pompidou in Paris.