text: Two fanbooks,  and , were published by Square Enix on October 24, 2009, and September 25, 2010, respectively. The characters Hei and Suo also appear in Heroes Phantasia, a 2012 role-playing game by 	Witchcraft.
  Reception
  The series was a jury recommendation in the "Animation Division/Long Animation" category of the 2007 Japan Media Arts Festival. At the 2008 Society for the Promotion of Japanese Animation awards, Hei was the second "best male anime character"; Kazuhiro Wakabayashi was the best casting director, Darker than Black was the second-best television series, with the second-best original score, and Okamura placed fifth in the best-director category. Hei is a popular character in Japan, finishing seventh in the "Best Male Character" category of Animages 2010 Anime Grand Prix. In a Newtype poll, he was the 10th-most-popular male anime character from the 2000s. The home-media releases of both seasons were successful in Japan, including the Blu-ray box. In the United Kingdom, the series was nominated for the 2009 NEO Award for Best Anime. It was the winner of the "Best Original Anime" award by Japanese magazine GoGoplex. Japanator named Darker than Black one of best anime of the 2000s, calling it a "beautifully animated show by BONES is sure to please anyone looking for a dark and serious show".