Originally Posted by theducks
Unless the Image is GPL, it is best to leave this collecting up to the individual user.
I believe for artwork and the like, "Creative Commons" is usually the license used for freely distributable content. Unfortunately, a lot of them do look cartoonish.
Would you be able to create something similar to this but with a much smaller left margin? Would be great if the leather grain size could be reduced, too.
The generic covers iBooks makes are pretty decent, too.