頼まれたものでしたが、沢山種類があって、これを選んだところ、思っていた本より厚い本でした。でも丈夫そうなので良いと思います。

With more than two million copies sold, this title has opened up a world of learning to a generation of children. For this edition, created for the 25th anniversary in 1992, Martin restored his text to its original wording. Full color.