I’m a huge fan of ebooks for obvious reasons – I make my business with them. But I’m also a huge convert from buying paper for reference reading/research to preferentially (and exclusively) buying those books in ebook form. Why? Highlighting and note-taking is so much better in ebook form.
I used to buy all my reference books in paper for the expressed purpose of highlighting. Now, I can’t stand to do that! I like having my highlights easily available and ready to read, and for that, paper just doesn’t cut it. I get all my reference books on Kindle now and highlight and take notes there. Not only is it readily accessible (I just recently went through and read all my highlights again for one of my favorite books The Practicing Mind) but I can copy/paste them if I want to work with them further (I like to brainstorm off my highlights, and for that I need a keyboard). You can access all your kindle highlights on the kindle itself, but also here online: https://kindle.amazon.com/your_highlights
(I tell you all this because I find people aren’t really aware of how to highlight on kindle, but once they figure it out, they’re True Fans)