A book is the most cost effective way of spreading literacy. It is portable an handy. Reading a book does not cause any physical discomfort or eye strain. There is a high degree of respectability in the written word. Book develop our powder of expression and personality. It is the source of a wealth of knowledge on a particular subject. It is important for serious learning.
Book are indeed irreplaceable now or in the near future, for they are immortal.
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