Dexter’s world changes forever when his Grandpa shares an astonishing secret, and whisks him away on an epic adventure filled with double lives and amazing inventions. Suddenly, Dexter finds himself at the heart of the Resistance, battling against the wicked Evan Kostroff – an evil man with a dastardly plan to wipe out humanity and create a new space world in which only the smartest people will live.

Join Dexter on his thrilling, globe-trotting journey, during which he teams up with talking animals and a host of colourful friends. Packed with action, laughter and fascinating facts about many countries around the world, this is an adventure you won’t want to miss!

Dexter Olsson has become a smash hit in Sweden, with over 50,000 readers. Now, this much-loved series is available in a brand-new, updated English edition. Grandpa’s Secret is the first book in Michael Wiander’s laugh-out-loud, fact-filled adventure series that’s perfect for fans of Jules Verne’s, and other, thrilling tales.