Board Thread:News and Announcements/@comment-3544775-20140725110413

Nanatsu no Taizai will be getting 2 novel adaptations in February 2015. The story and the author of the novels is still unknown.

edit: Titles for the novels are revealed:
 * 「宿命の七日間」 - Shukumei no Nanoka-kan (Fate's Seven-day Period)
 * 「昔日の王都　七つの誓い」 - Sekijitsu no Ōmiyako, Nanatsu no Chikai (The Kingdom of the Olden Days, The Oath of Seven)

 