Der Schwur des letzten Sultans

from the back of the book Almost two millennia ago Rondra gave the people of Bosparan the legendary trumpet of Perricum, which could collaps city walls of Nebachot. Since then, the the descendant of Nebachot quarrel with their fate, and why Rondra has left them. But now, while the country is threatened from the north, on clues on an ancient artifact are discovered that could unite the warring tribes. Unfortunately, the notes are thin, and it does take some very smart people to discover the eons-old track - and some powerful warriors to battle through the rough wilderness of the Raschtulswall-mounntains.