Another you-can-do-it-too with Dr. Laird maintaining that brain power is primarily the mechanical workings of your grey cells. Tests and yet more tests and advice here and there on how to increase your facility with numbers, vocabulary, visual perception, powers of mental induction, etc., with intuition thrown in. A good quota of fact behind all this, but the style is steep going, if you don't like chumminess and oversimplification. Carnegie approach, lots of little tales about big success stories, modern Horatio Alger morals.