Young Samurai: The Way of the Sword hope Jack has of protecting his father's rutter—the invaluable navigation guide of the world's uncharted oceans—from Dragon Eye. Forced into a deadly battle, Jack's going to have to master the Way of the Sword. And his time is running out. Publishing rights to the first three books in the "Young Samurai" series were acquired by Puffin Books in a three-way auction in 2007. Disney then bought the US publishing rights in the same year in a pre-emptive deal prior to the Frankfurt Book Fair. The translation rights to the series have since been sold to over 20 different territories, including
Sword Art Online go "back to the real world." The Unital Ring story arc began in volume 21, which was released in Japan on December 7, 2018. Kawahara also writes the "Sword Art Online: Progressive" series, which covers Kirito's adventures on the first few floors of Aincrad. The first volume of "Progressive" was released on October 10, 2012, and four volumes have been released as of December 10, 2015. The first volume of a light novel series based on "Sword Art Online" titled "Sword Art Online Alternative Gun Gale Online", written by Keiichi Sigsawa with illustrations by Kouhaku Kuroboshi, was published by ASCII