A good book with brief history of muslims in an easy words even a lay man can easily understand .this book covers the revival of muslim world and how its decline start throug out the book i came to conclude that untill muslims follow the islamic rules and they have bounded with the islamic laws they have ruled the world ,when muslims started to unfallow tha islam and adopted other nations culture among themselve the decline of the great ummmahh started...i would reccomend all the muslim youth to read this book once in a life.