The human brain is the most fascinating and the most complex machine we can think of. Great inventions like those of electricity, radio, telephone, television, motor car, steam engine, aeroplane, computer, and numerous others which have made our life comfortable and easier are the result of the exercise of the human brain. This introductory level book discusses, logically and systematically, the biology, mechanism and inter-networkings of the brain and shows the linkage between neural networks and fuzzy logic.