TimeRiders: The Mayan Prophecy (book 8)
When Maddy finally unlocks fragments of the secret that Becks has been holding on to, the TimeRiders start to piece together their true purpose. Racing through time to connect the clues, the team discover a Mayan tribe where an ancient relic provides a vital link to the past . . . and future.
But not all the TimeRiders can cope with the discovery, and one threatens to bring them all down if they can act out their revenge . . .