Lateral thinking was always in the back of my mind, but this book gave me an insight into this often quoted but least understood topic.The techniques like analogies, alternatives, brainstorming stand out.nice book to understand the thinking process and to expand it. since its reference and main points were earlier studied, I was expecting every thing to new, which was not. overall a nice book which challenges our thinking to expand thinking step by step. This is an each making book by de Bono. Quite useful for creative and innovative thinking and teaching the new generation of learners deviating from the traditional ways, Finally Counclude that it is a Useful Book