These book trees grow a choice selection of story-books, encased in broad green husks which, when fully ripe, turn to a deep red color. When the books are picked and husked they are ready to read. If they are picked too soon, the stories are found to be confused and uninteresting and the spelling bad. If allowed to ripen perfectly, the stories are fine reading and the spelling and grammar excellent.
As soon as the books are read the words disappear and the leaves wither and fade. This is the worst fault of all books which grow upon trees. (Tik-Tok of Oz)