GeoffR,
You're just going to have to start buying "big boy" books with more words and less pictures!
I hadn't thought about books with images taking up so much more room, guess I don't have (m)any with maps, diagrams, images, etc. Thanks for pointing out something that I was clueless about. Always nice to see something from a different viewpoint, I couldn't for the life of me imagine why HTML would take up more space because of higher resolution displays...