Publisher: Kodansha Comics
Release Year: 2012
Item No.: 9781612620589
Fairy Tail volume 21 features story and art by Hiro Mashima.
Natsu and the gang journey to Edolas, a parallel world in the sky, in search of their vanished guild. Instead they stumble upon the parallel version of Fairy Tail and find their guild mates all have completely different personalities, as well as a long lost member of the original guild.