Combination. I love paper books, but ebooks are more handy.
I carry a book with me all the time (to read on the bus, etc.) and if that's a thick title, eReader is a lot smaller and lighter. And there are titles not available as paper book any more, but still available as ebooks. Not mentioning the space on my shelves, or if I have to move and pack all into boxes.
In a Cardassian library
or in a Cardassian gallery
"Reagan, it appears, is really only an ardent unionist if the unions in question are in Poland" - Stephen King, Skeleton Crew