As you may have gathered by now, I rather love my iPad and use it all the time. When, for example, I get sent proofs of my books to check through as PDFs, I tend to fling them over to the iPad and read them on there, as I find it much easier to read a document that way than on a computer screen. But the only danger is that you are at the mercy of the quality of the software interpreting the PDFs, which don't have as straightforward a file format as an image file. I discovered this recently when I was looking at the proof of a page from an illustrated book I've got out later this year. Part of one of the pages looked like this:     You can see there's a statue of Galileo to the left and to the right, bleeding across to the next page is a strange bit of hieroglyphics like something out of the Da Vinci Code . Very nice, I thought, but what does it mean?  So I sent a note to the editor, who came back swiftly, something to the effect of 'Isn't it obvious? It's Ga...