Katherine Roberts
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