[nobody31415926]

Is it perhaps because you aren't allowed to read eBooks to your children ?

http://www.lessig.org/content/standard/0,1902,22914,00.html

[maxerickson]

For those that don't click, Adobe published the (public domain) book and ran screaming away from the position implied by the parent. The file had some "don't read aloud" metadata that Adobe claimed was for devices and then removed in a subsequent version.