There are three types of intelligences: cognitive, emotional, and spiritual with the associated quotients: Intelligence Quotient (IQ), Emotional Quotient (EQ), and Spiritual Quotient (SQ), respectively. Whereas, the IQ measures the intellectual capacity of a person, EQ measures the person's self-awareness, feeling of empathy to be sensitive to situational feelings; SQ refers to the persons' ability to build their capacity for the meaning of life, the vision and value they hold, and strive for the self-actualization by connecting with inter self and the higher self. It has interface with spirituality to help oneself create a balance amongst the various facets of one's life. Spiritual Quotient (SQ) is the sum total of IQ and EQ. IQ is the functionality of left brain; EQ is the functionality of right brain; and SQ is the functionality of whole brain. SQ has been understood to be the most fundamental of the three 'Q's. The present book is about the "Spiritual Intelligence: its significance, applications, measurement, and the development techniques". The book is divided into twenty chapters, explaining the skills, aspects, components of Spiritual Intelligence and how to apply, measure and develop one's SQ.