The Mathematician's Mind: The Psychology of Invention in the Mathematical Field (Princeton Science Library, 109) Paperback – 20 October 1996

Despite the age of this book the collections of stories from inventive geniuses about how "insight" sprang upon them out of the blue is highly convincing. This is the book that outlined the stages of insight including preparation, incubation, insight, etc. Doubt still exists regarding the operation of the subconscious mind but all the examples offered here lower the doubt in my own mind and I think we must recognize that which seems to be really happening..