The late-20th-century resurgence in brain and mind studies (exemplified by the Mind and Life conferences, and ignoring A.I. for the moment) throws fresh light on this collection of studies, essays and reports. Free of behaviourism's shackles, the critical investigations into trance, dream, meditative, hypnotic, drug-induced and other non-ordinary states are fascinating and sometimes unforgettable, such as Milton Erickson's extraordinary account of co-investigation with Aldous Huxley into the latter's unique "Deep Reflection" state. ( )