<P> The series' protagonist is an asthmatic 12 - year - old boy, Arthur Penhaligon . The series begins on a Monday, with the main events starting a week later on the next Monday . Each book moves onto the next day of the week, over the course of about three weeks in Earth time, concluding on a Sunday . Each day features beings, collectively known as the Trustees, who each govern a portion of the House, which is the center of the Universe . The seven demesnes of the House are, in the order Arthur visits them: the Lower House, the Far Reaches, the Border Sea, the Great Maze, the Middle House, the Upper House, and the Incomparable Gardens . </P> <P> In the beginning of the first book, Arthur lives a relatively normal life as an adopted child in a large and caring family . An asthma attack on a Monday that should have killed him brings him into contact with Mister Monday, who rules the Lower House . He eventually finds his way to the Lower House himself, where he is to find the cure to a plague brought to his world by dog faced' Fetchers' . By convenience, he is declared Heir to the Kingdom and given the Lesser Half of the First Key, which is shaped like the minute hand of a clock . Because of this Key's magical properties, Arthur is relieved of his asthma while in contact with the Key or in the House, and proceeds to a strange and dangerous set of adventures . </P> <P> As Arthur discovers, the Will of the Architect (creator of the House and the "Secondary Realms" that surround it) was not fulfilled as it should have been . Instead, it was broken into seven pieces by the Architect's Trustees, the self - named Morrow Days . The Will was forced to act on its own, and its First Part chooses Arthur to be the Heir to the Kingdom . It thus becomes Arthur's responsibility to recover each of the missing pieces of the Will, defeat each Trustee--each of whom has been afflicted with one of the seven deadly sins - claim their domains by taking each Key, and ultimately fulfill the Will . </P> <P> After Arthur has taken each of the seven keys, and the will becomes fulfilled, a huge wave of Nothing dissolves the Incomparable Gardens, Lord Sunday's domain, and the first thing the Architect created . This causes the whole of creation to be destroyed with it including all of the secondary realms (including Earth). Arthur regains consciousness in the void of Nothing (as he holds the power of all seven keys, he is unable to be destroyed unless he so wishes), and he meets the Architect, who is revealed to be the Old One and the Will, once split into two parts to govern the house and the secondary realms respectively . When the Architect and the Old One fell out, the Architect chained the Old One eternally . Doing this meant that she could not return to Nothing when she wished, as she had to go as one . The only way to release the Old One was to destroy creation . These terms were laid out in the will . </P>

The keys to the kingdom by garth nix