Sách nói: Tarzan Twins

Dick and Doc aren't actual twins. They're technically cousins, being the sons of twin sisters. But having been born on the same day and looking and behaving nearly exactly alike, they certainly feel more like twins than most. On the way to visit their cousin Lord Greystoke, also known as Tarzan, King of the Apes, in the wilds of Africa, their train derails and they wander off into the jungle for a little exploring, not realizing that they would soon find themselves lost and imperiled on an adventure of a lifetime! (Summary by Ben Tucker)