Another light novel license to announce! Vertical will publish a novel titled The Seven Deadly Sins: The Seven Scars Left Behind, planned for English release in May 2017. This book was written by Shuka Matsuda, and includes illustrations by Nakaba Suzuki–the creator of The Seven Deadly Sins manga series.
It sounds like this light novel is a prequel to the manga. It was released in Japan in October 2015. There are two other light novels for this series in Japan, but no word on a localization for those yet.
The Seven Deadly Sins Synopsis:
The “Seven Deadly Sins,” a group of evil knights who conspired to overthrow the kingdom of Britannia, were said to have been eradicated by the Holy Knights, although some claim that they still live. Ten years later, the Holy Knights have staged a Coup d’état and captured the king, becoming the new, tyrannical rulers of the kingdom. Elizabeth, the king’s third daughter, sets out on a journey to find the “Seven Deadly Sins,” and to enlist their help in taking back the kingdom.
The manga is available in English courtesy of Kodansha Comics. You can watch the anime adaptation on Netflix.