The Art of Thought, originally published in 1926, was the first work to give a clear, inspiring, and authoritative exposition of the process of reasoning, in language adapted to the general reader as well as the student of psychology. It established itself as a standard guide to the mechanism of thought, and its message remains of essential value to a world confronted with problems of increasing complexity.
Graham Wallas was an English socialist, social psychologist, educationalist, a leader of the Fabian Society and a co-founder of the London School of Economics. Wikipedia
This book is one of the most cited references pertaining to the thought process and the emergence of creative ideas. Wallas establishes the framework of Preparation, Incubation, Illumination, and Validation.
new pastime: reading a book after you've referenced it in your thesis... Wallas provides great model of generating creative thought: Preparation, Incubation (v important), Illumination (heralded by Intimation), Verification. The second half was also very interesting - it detailed his plan for an experimental secondary school for 'supernormal' children who would be inclined to take up professions that involve serious thinking in their adult life. I'm not sure if this was ever tried out by the English public school system but I agree that a lot more needs to be done for the gifted and talented (regardless of family economic/class status) in secondary schools so that they can pursue learning at an accelerated pace and achieve their full potential.