I find that physical books work way better for me.. I have a mostly photographic memory and the feel of book, and position of the content adds additional context I just don't have reading an e-format for too much at once. It all tends to just blur together pretty quickly.
Quick blog posts, and tutorials aren't too bad.. short specifications are fine too.. but longer content just doesn't work in an electronic interface for me.
...or old-style internet tutorials formatted as static mostly-HTML webpages.
Or what about printed books. After reading that kind of internet tutorial I got K&R and some less memorable C++ book from the local library.