Series: Echorium

Song Quest UK US

Crystal Mask UK US

Dark Quetzal UK US

Series: The Seven Fabulous Wonders

The Great Pyramid Robbery UK

The Babylon Game UK

The Amazon Temple Quest UK US

The Mausoleum Murder UK US

The Olympic Conspiracy UK US

The Colossus Crisis UK US

The Cleopatra Curse UK US

Spellfall UK US