The Sword of Azaray — Shannah Jay

In Azaray a magic sword has sung all true Kings to the throne. But Pavros, a powerful wizard, has killed the true king and
scattered the sword across the ring of worlds. The hilt, scabbard and blade each lies on a different world.
The true king's children, two boys and a girl cross from one world to the next to rescue the parts of the sword, battling against fearsome enemies and the most powerful magician ever.
Will they reunite the three parts of the sword and win through to Azaray?