There's has not been an installment of Gemimi Knives in the last couple of volumes of Megami that made their way over to me, in fact the last volume didn't even have a poster, but it looks like a novel has been out for a while without me realising it:
http://global.yesasia.com/en/PrdDept.aspx/code-j/section-books/pid-1004150930/
http://www.amazon.co.jp/exec/obidos/ASIN/4059035084/
