Z:gnu-www-ja-fdl-howto-opt--3b16f9-Cover texts are a new feature,/en

Cover texts are a new feature, so I cannot cite past examples of their use, but the intended purpose is simple. They are meant to give the original publisher of an edition a way to ask or encourage people to buy the copies they publish rather than those of some other reprinter. For example, we could imagine specifying this as a back-cover text: