I got a lot of computer books. Some of them are getting very "outdated". I have to flow them away. That is very sad! Thus, I am aimed to have a paperless reading life. I am trying to ebook or online resources only.
Firstly, I had an account at Safari. There is a kind of electronic library. I loan some books in there. I bought an account with 10 slots of books. So I can loan ten books from there. As long as I pay the month fee. I can keep those books as long as I want. But after I used the slot, I need to keep it one month. After one month, I swap that slot with a new book.
Secondly, I will use my kindle. Safari has a lot of computer books, but there are not many novels. So, I use my kindle to novel.

I hope this way can have some trees!