Nicholas Carr on E-Books - WSJ.com: The ability to alter the contents of a book will be easy to abuse. School boards may come to exert even greater influence over what students read. They'll be able to edit textbooks that don't fit with local biases. Authoritarian governments will be able to tweak books to suit their political interests. And the edits can ripple backward. Because e-readers connect to the Internet, the works they contain can be revised remotely, just as software programs are updated today. Movable text makes a lousy preservative.
Such abuses can be prevented through laws and software protocols. What may be more insidious is the pressure to fiddle with books for commercial reasons. Because e-readers gather enormously detailed information on the way people read, publishers may soon be awash in market research. They'll know how quickly readers progress through different chapters, when they skip pages, and when they abandon a book.