The Polar Bear Explorers' Club (The Polar Bear Explorers' Club)
2018
Explorers on Black Ice Bridge (The Polar Bear Explorers' Club)
2019
The Ocean Squid Explorers' Club : The Polar Bear Explorers' Club, Book 4 (The Polar Bear Explorers' Club)
2021
Explorers on Witch Mountain : The Polar Bear Explorers' Club, Book 2 (The Polar Bear Explorers' Club)
2018
Insel der Hexen: Der Polarbären-Entdeckerclub 2
2019