剧情简介：What if every person in the world do the other three would be a favor - and if those three people would then pass back a favor to three other ... and so on would be: Until the world to another? - Trevor, a boy, believes in the goodness of man, and fulfilled his hope of a better world, in an overpowering way.
作者：Catherine Ryan Hyde
出版社：Pocket
ISBN：9780743412025
