Hyougetsu 
Der Werwolf: The Annals of Veight -Origins- Volume 4 [EPUB ebook] 

Veight has solidified a human-demon alliance in Ryunheit on his quest for coexistence. But now, the fate of the demon army is at stake as the Weremage joins Firnir the Swift Gale on an assault on Thuvan! Faced with iron defenses and the impending reality of a battle of attrition, Veight puts his plan into action, but how will it all pan out?!
Includes a must-read story specially written by the original author, Hyougetsu!