Matthew Weiner interviewed in the NYTimes:

I prefer print books, but I have purchased a lot of e-books. There’s an incredible power to holding the iPad or the Kindle and seeing all the choices available, but it’s a little bit like opening Netflix. It can be overwhelming and feel like a collection instead of a library. Deep down, I prefer paperbacks that I can bend the pages in, and write in with a ballpoint pen and take in the bath. Also, e-books completely nullify the adventure of used books. With a used book, I love reading inscriptions, finding business cards and notes, and constructing another narrative about who it belonged to.
Seems Weiner has the same book habits as me.