Translated from the Japanese.
"First published in Japan in 2007 by Enterbrain Inc."--Vol. 1, facing t.p.
Reads from right to left.
OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
Song of the hanging sky by Toriko Gin. ISBN 9781605100241. Published by Go!Comi in 2008. Publication and catalogue information, links to buy online and reader comments.
