Die Fliegende Schule der Abenteurer

[yetie]

A german book serie about a 4 kids that travel around the world saving diffrant places
in a couple of books there are illustations of the girls of the group getting tied up
book 2, the kids find a woman tied up and gagged, later on in the book the kids get tied up and of 1 of the girls its a illustation of the girl tied up



Book 3, a pick is shown 2 of the kids captured