As much as I like ebooks, there are times where paper is the better option.
Take pop-up books, for example. While you can add animation to an ebook app, it doesn't quite have the same impact or immediacy as a pop-up book. And as you can see in the video below, The Pop-Up Book of Phobias is plenty scary for a paper book.
This book shows a number of fear-inducing scenes, in all their glorious detail. It is so effective that even if you don't have a phobia before reading this book, you might after.
The book came out in 2009, but it only just crossed my desk today. It costs $54 on Amazon, in case you're interested.