'The Castaways of the Flag' is the sequel to 'Their Island Home' and the 47th book of the 'Extraordinary Voyages' series. A huge fan of 'The Swiss Family Robinson,' by Johann David Wyss, Verne decided to pick up the thread and, with the addition of 'Their Island Home,' turn one story into an unofficial trilogy. This, the final instalment, follows the fortunes of the family, as they finally leave the island and head for home. However, will its shores prove too difficult to escape from forever? A fitting finale to Wyss' original tale, this book is for lovers of Verne and Wyss, alike.