In this book we cover several topics and address some of the most important questions such as: what is intelligence? How to improve your intelligence? What is the growth of intelligence? What are the types of intelligence? And the foods that are necessary for the mental growth. Nowadays it had become necessary to improve some specific types of intelligence such as interpersonal intelligence and logical intelligence in order to stay in the competition for the best jobs in the multi-national companies and in particular if you start a Military career.To achieve such goals one has to improve one's logical and interpersonal intelligence level.