Alex Bell

Explorers on Witch Mountain

2018

The Polar Bear Explorers' Club

2017

The Hunt for the Cursed Unicorn

2024

The Glorious Race of Magical Beasts

2024

A Most Peculiar Toy Factory

2020

The Lighthouse

2022

Explorers on Black Ice Bridge(Polar Bear Explorers' Club)

2019

The Polar Bear Explorers' Club(Polar Bear Explorers' Club)

2018

The Ocean Squid Explorers' Club : The Polar Bear Explorers' Club, Book 4(Polar Bear Explorers' Club)

2021

Insel der Hexen: Der Polarbären-Entdeckerclub 2

2019

Reise ins Eisland: Der Polarbären-Entdeckerclub 1

2018