This is a rare opportunity to have three classic book in one. It saves money and space. I have read the individual books separately and have listened to the audiobooks as well but having the three in one print is a very rare opportunity for me to read the books all over again. And for the token price i paid for it i think it is worth buying it. The principles thought by the three books are very essential for the people that have big dreams and want to make success of themselves.