Gert-Jan van den Ende

When Ernst and Bobbie visit a fantastic circus school, disaster strikes. The circus school burns down, and to save it, Ernst and Bobbie must track down a great treasure. As they follow a treasure hunt that leads them to the strangest places, the circus director is also kidnapped. Pursued by the criminal Fedor and his innocent niece Indy, they face thrilling and dangerous adventures...

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By accident, Ernst and Bobbie call the emergency helpline 0900-WATER and end up promising to help find clean drinking water in the African country of Nbuku...

Ernst and Bobbie are given an impossible mission: they have to return a rare animal to its natural habitat. To complete this task, they decide to travel deep into the jungle...

Ernst and Bobbie are enjoying a well-deserved vacation when they discover that a beautiful nearby forest is about to be cut down. The villainous entrepreneur Wolter Onix wants to build an asphalt factory on the site to pave all of the Netherlands. But Ernst and Bobbie are determined to stop him so Onix challenges them to complete some tasks. If they succeed within three days, he promises not to build the factory. Their mission: bring together a famous pop star, 40,000 concertgoers, and a golden microphone. It seems like an impossible task, but Ernst and Bobbie are determined to save the forest...

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Ernst and Bobbie have won their dream vacation. But as always, things don’t go quite as planned — they suddenly find themselves in America! Can this duo handle an adventure on the other side of the ocean?

By an unfortunate twist of fate, Ernst and Bobbie end up on a giant cruise ship. The captain seems to have disappeared, and of course, Ernst and Bobbie set out to find him. But then they discover that a villain is on board! Their search leads them to a tropical bounty island — where the captain is hiding...

Ernst and Bobbie get the chance to move into a castle where they have to guard a precious treasure...

Strange things are happening at the North Pole. The fish are disappearing from the waters, and as a result, the seals and other animals are leaving the area. Egbert de Vries, a kind man who lives at the North Pole, calls in the help of Ernst and Bobbie. They set off to investigate — and along the way, they find themselves in one hilarious situation after another!

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The Forest Ranger is getting married to a very special woman. Because of his nerves, he's completely out of sorts, so he calls on Ernst and Bobbie for help. They assist with the preparations and decide, at the right moment, to go and fetch the bride. But it turns out she lives in the South Pacific—and she doesn't have very good intentions...