will there be thêm Cậu bé cưỡi rồng sách

at the end of the last book it says that he hopes after those twelve years of work he could come back and do thêm sách because of all the các câu hỏi people have unanswerd including things about angila ( im looking phía trước, chuyển tiếp to that ) sooooo dose anyone know thêm like when he will do more