The Edge Chronicles
The Edge Chronicles is a children's fantasy novel series by Paul Stewart and Chris Riddell. It consists of four trilogies, plus four additional books, and other books related to the universe (The Edge). The series was originally published by Doubleday, a subsidiary of Penguin Random House, and has sold more than three million copies, according to its publisher. The stories of "The Edge Chronicles" take place in the fictional world of The Edge, a vast cliff with no apparent bottom. The majority of books are grouped into sagas, with each saga focusing on one character. The  series covers a 600-year period, divided into three "Ages of Flight". In The first age, floating rocks were used to stay airborne but then stone sickness, which made the rocks crumble, hit. Then, floating wood was used, and finally phrax-power. The power of flight is a major theme of the books, with each age defined by the current technology used for air travel. The series is notable for its flora and fauna, along with the maps of various locations in The Edge. The first three trilogies were released over the course of 1998 to 2006, with a standalone  saga serving as a conclusion to the first two ages of flight and a beginning to the third released in 2009. The series was planned to end after the tenth book, with the author's blog, Weird New Worlds serving as the continuous adventures with weekly 'chapter' installments. After the completion of the 66 chapters of the blog, the authors decided to revisit the series with the fourth trilogy which would adapt the characters and stories from the blog, with the first and second books released in 2014 and 2015 respectively. The series also includes a number of short stories , along with a companion book. Books. Section::::"The Immortals". The Immortals is the 10th book of "The Edge Chronicles" and was released on 5 February 2009 in the United Kingdom and 14 September 2010 in the United States and Canada. The book introduces the Third Age of Flight and the character Nate Quarter, and serves as a conclusion to the Quint, Twig and Rook sagas. Other. The following titles are not available in book form. Chronology. The "Edge Chronicles" books are not always released in chronological order. The following table summarizes the stories to date: <nowiki>*</nowiki> Part of "The  Lost Barkscrolls" (Also marked by "Side Story" in book number column). "Cloud Wolf" and "The Stone Pilot" were also released separately as individual novellas previously. "The Stone Pilot" is told from the narrative of Maugin reminiscing on her past. Content of this story falls chronologically fourth while the story is told by Maugin at a later point in time, likely around the end of "The Last of the Sky Pirates". "The Edge Chronicles Maps" Detail 'The Edge' during the first and second age of flight covering a time period from before "Cloud Wolf" until some point in time between "The  Blooding of Rufus Filatine" and "The Immortals".