for me books are your best teacher after time, books are the best friend, the book enhance your knowledge.
books help in the most difficult time you can solve your problem with help of reading book related to your problem.
books also help you earn, for example; school book which we read from the age of 3 till graduation completes and then we move to earn by the help of knowledge with which we improved our speaking, learned languages, mathematics, biology, physics, chemistry, etc.,
book is the best friend.