This book is on 'Sreyas' a saskrit word or happiness with success. The book consists of 12 chapters. The first four chapters are on the concept of happiness with success, concept and theories of personality, Positive Psychology and psychometric test chapters 5 to 11 are the psychological traits and behaviour patterns associated with happiness with success. The book is on personal efficacy built on people orientation and performance orientation combined. The book is on self---development built on a strong theoretical foundation, useful for anagers, psychologists and common people.