has since become widespread, especially in DC's Vertigo line and many Marvel comics. Morrison estimated the final product's total page numbers would have been 64 pages. With McKean on board as the artist, the script was subsequently revised and the total page numbers were expanded to 120 pages. Collected editions Arkham Asylum was published in hardcover () and trade paperback () in 1989, the same year of Tim Burton's Batman film being released. Both Warner Books () and Titan Books () also published trade paperbacks in 1990. The 15th anniversary edition was published in hardcover () and trade paperback () in 2004. This edition contains a brief biography of both Morrison and McKean, credits to those who involved in producing the first edition of the graphic novel, the annotated script, Morrison's personal thumbnail layouts, and an afterword by editor Karen Berger as bonus materials. The 25th anniversary edition was published in hardcover () and trade paperback () in 2014. New bonus materials are Morrison's 2 page synopsis, some extras in the Morrison's thumbnail layouts, and a gallery of McKean's rough sketches and original promotion art back in the 90s. The absolute edition () was published in 2019 with McKean involved in designing the book. For this edition, McKean took the opportunity to change the colour of Joker's dialogues in the entire story from red and white back to wine red because this was what he always wanted back in the days, but somehow the design was changed in the post-production of the first edition. Majority of the bonus materials printed in the 15th and 25th anniversary editions are also presented in this book. New additions to this book are McKean's detailed description of how he designed this book and a few extras of the artist's rough sketches and promotion art. The trade paperback known as new edition () was published in 2020 under the banner of DC Black Label. The hardcover deluxe edition () was published in 2021. This edition reuses the story pages from the absolute edition; the colour of Joker's dialogues in the entire story are all evidently changed into wine red. The design of the book and bonus material pages offered in this edition retain the same format as the 25th anniversary edition. Critical reaction and legacy Upon the graphic novel's release, it became a commercial success and catapulted Morrison and McKean's name in the comic book