This guide to LEGO Harry Potter: Years 1-4 contains a complete set of information that each young magician needs in order to finish the game in 100%. Apart from some basic information on the gameplay mechanics, Hogwarts, spells and The Leaky Cauldron you will find a description of all the mission you have to complete during each year spent in the castle as well as a detailed description of the bonus items - Red and Gold Bricks, Character Tokens and Crests. Additionally you will find a map of Hogwarts which will prevent you from getting lost in this castle, full of passages and corridors. There's also a list of bonus locations and characters in a convenient form.