Yu Aida finalized the tragic Gunslinger Girl manga last year, with the 15th and final volume the 2002 series about traumatized girls turned into special ops assassins released in December. Retailers are now listing that North American publisher Seven Seas has the Gunslinger Girl: Finale volume slated for July 2nd, 2013 release.
A limited edition of the Japanese release was packaged with a "Libretto" mini-art book.
The series was an early title from ADV Manga, launched in 2003. The release was slow, with volumes 2 and 3 coming two years later, with another two years between those collections and the release volume four. In 2008, following the closure of ADV, Seven Seas picked up the title.