WAmelia Peabody series
WAtlantis (novel)
WCrusader Gold
WThe Dig (novel)
WThe Dig (video game)
WThe Gods of Atlantis (novel)
WHeaven's Vault
WThe Last Gospel (novel)
WMelancholic Princess
WThe Source (novel)
WThe Tiger Warrior
WBuried treasure
WTreasure map