ebook prices have got to go down, way down

Almost bought Brian Green's Hidden Reality and/or Fabric of the Cosmos for Kindle. It would be really cool to read this space-science stuff in a Star-Trek-ish, futuristic manner.

But this impermanent (probably unreadable with the next major upgrade of hardware or software, subject to being revoked even from within my home at the whim of the publisher, etc.) edition actually costs about half a dollar more than the relatively permanent (will probably last the rest of my lifetime, even if it's on cheap paper) paperback.

Forget it. I'm getting reliable paper.