Routledge is now re-issuing this prestigious series of 204 volumes originally published between 1910 and 1965. The titles include works by key figures such asC.G. Jung, Sigmund Freud, Jean Piaget, Otto Rank, James Hillman, Erich Fromm, Karen Horney and Susan Isaacs. Each volume is available on its own, as part of a themed mini-set, or as part of a specially-priced 204-volume set. A brochure listing each title in the "International Library of Psychology" series is available upon request.

First published in 1999. This is Volume III of twenty-one of a series on Cognitive Psychology. Written in 1926, this book looks at what common sense is, how we might arrive at an idea or discovery by inspiration, or at a judgment or decision by intuition; when in either case we have no knowledge as to how the result is suddenly attained.