Incredible detective adventures in the style of Indiana Jones and Hercule Poirot from bestselling author Alex T. Smith. Embark on a real adventure with Mr. Penguin and his assistant Colin. This time, this couple crashes on top of a snowy mountain. Will they be able to solve the mystery of the missing pets? What strange sounds are heard near the abandoned fortress? And will Mister Penguin conquer his fear of flying? All this awaits you in the second book of the series of adventures of the penguin detective and his assistant, where there are even more secrets and mysteries. Bestselling author Alex T. Smith is the winner of such awards as the Sainsbury's Children's Book Award and the Waterstone's Children's Book Prize. “Mr. Penguin and the Mystery fortress" is the second book in a series of funny and exciting stories about an amazing detective and his assistant. For primary school age.