The Serpent’s Curse by Tony Abbott

The four friends are back and on another even more awesome adventure…

The hunt for Copernicus’s first relic sent Wade, Darrell, Lily, and Becca to the far reaches of the world and put them in serious danger. But they never imagined Sara Kaplan – Darrell and Wade’s mother – would be kidnapped by the conniving Galina Krause. Now they must race the evil Teutonic Order to find the Serpent’s relic and rescue Sara before it’s too late.