Let Me Go question

Will there be a book 7 (another one after Let Me Go)? I read the series thinking it was complete. But there were some plot points unresolved in LMG. It looks like the author intends to continue the series. But there's been no news about book 7 (it's been like three/four years). Someone pointed to the author's Twitter feed, but that link is dead. Does anyone know if the series will continue?