The iPad is pretty much the Hitchhiker’s Guide to the Galaxy, and I only just noticed.
Here’s a passage from So Long and Thanks for All the Fish – one of the five books in the trilogy.
“Fenchurch leaned across him and drew over her canvas bag.
“Is it anything to do with this?” she said. The thing she took out of her bag was battered and travelworn as it had been hurled into prehistoric rivers, baked under the sun that shines so redly on the deserts of Kakrafoon, half-buried in the marbled sands that fringe the heady vapoured oceans of Santraginus V, frozen on the glaciers of the moon of Jaglan Beta, sat on, kicked around spaceships, scuffed and generally abused, and since its makers had thought that these were exactly the sorts of things that might happen to it, they had thoughtfully encased it in a sturdy plastic cover and written on it, in large friendly letters, the words “Don’t Panic”.
“Where did you get this?” said Arthur, startled, taking it from her.
“Ah,” she said, “I thought it was yours. In Russell’s car that night. You dropped it. Have you been to many of these places?”
Arthur drew the Hitch Hiker’s Guide to the Galaxy from its cover. It was like a small, thin, flexible lap computer. He tapped some buttons till the screen flared with text. “
iPad + wikipedia = Hitchhiker’s Guide.
Actually, if you read the Wikipedia entry for the guide. Which is kind of meta. It says:
“The Guide’s numerous entries are quoted throughout the various incarnations of the Hitchhiker’s Guide series. As well as offering background information, the Guide’s entries often employ irony, sarcasm and subtle commentary on the action and on life in general.”
So it seems fitting that you can buy this cover: