Dear Arthur (имя получателя),
Thank you for your nice email. I was happy to hear from you again.
In your email you asked me about BOOKS (общая тема).
Well, I prefer reading paper books because I love the smell of paper. (ответ на первый вопрос).
As for me, reading books is my favorite hobby. (ответ на второй вопрос)
So, I think books will never disappear. (ответ на третий вопрос).
Sorry, I have to go now. My dad asked me to help him in the garden.
Write back soon.
Best wishes,
(ваше имя без точки)