Hedgehog in the Cage (in Czech: Ježek v kleci) is a very enigmatic puzzle, over a century old. It travelled through 3 continents to become a cultural phenomenon in Czech Republic and to play a key role in a trilogy of adventure stories by Jaroslav Foglar written in 1940. The object of the puzzle is to find the correct position and angle that allows the object - the "hedgehog" - to be removed from its entrapment in the cage. The puzzle is also known as Cage & Ball Puzzle. A weird course of events presented in Wikipedia goes like this. The first known model of the puzzle was patented by the American inventor Clarence A. Worrall in Philadelphia, Pennsylvania, on 7 April, 1896. It has been suggested that Worrall's invention was inspired by a Japanese puzzle called the Snake and Star, which appeared in the catalogue of the games manufacturer Selchow & Righter on 25 May, 1895. The puzzle seems to have arrived in Czechoslovakia around 1935. It was produced at a toy factory in Roudnice nad Labem. In 1940 Jaroslav Foglar published "Záhada hlavolamu" (Mystery of the Conundrum), the first part of his sequence of stories about the Rychlé šípy (Rapid Arrows) boys' club. The puzzle plays a key role throughout the entire plot. Rychlé šípy comics series began to appear in the magazine Mladý hlasatel (Young Herald) in December 1938, and gradually became the most popular series in the history of the Czech comics. However, their adventures involving the Hedgehog in the Cage are written in the standard novel form. As a cultural phenomenon the puzzle inspired a myriad of similar puzzles and remakes to be invented, predominantly by Czech designers. This review highlights just a tiny fraction of them, which we consider the most interesting to try your hands at. Happy Puzzling!