Hard Copy Vs Soft Copy Book

Hard vs Soft copy book is a great debate among itself  due to internet things have become very easy we can download any book in any corner of the world and have the store house of immense knowledge i would prefer that soft copy and better option as its a more greener way of gaining knowledge without cutting trees but i do have some setback as i do not help us emotionally connected to the topic which we are studying the feeling of touch with finger and writing holding a pen is a awsome things i help us to think rationally i also agree we can not have all hard copy of topic as we all do not have access to printer at home and were soft copy is the only option but then i will tell that one should takes notes on the topic and keep them maintain on there blog or in hand writing journals so to study the topic directly without beating the bush.
So from now ownward i will keep notes so that i can read them directly when somethings in required
on that topic.

The books which i m currently reading are as below