7. Dr. Spock’s Baby and Child Care – 50 Million
By Dr. Benjamin Spock
This piece of interesting book was published in 1946, when Dr. Spock released his classics on how to raise children. This book became so important and at the same time interesting as it was authored by a man who is traditionally known to abandon the role of bringing up children. In fact this book has remained relevant for many generations and a foundation on which many families have relied on bringing up their children. The book covers range topics concerning the role of caring children. It is estimated that this book has been sold to millions of people and an estimated 50 million copies sold making it one of the best selling books of all time.