Title: Curse of the ancients
Description: Presents a mission to correct the past in order to save the future world and reveals the secret history connecting the SQ to the Ancient Mayans.

Dak, Sera, and Riq find themselves stranded thousands of years in the past, and their only hope is the Mayas who know a great deal about the future. Book #4
Subjects: Science fiction, Fiction, Mayas, Time travel, Adventure and adventurers, Juvenile fiction, Civilization, Conspiracies, Best friends, Child and youth fiction, Children's fiction, Time travel, fiction, Indians of mexico, mayas, fiction, Friendship, fiction, History, ancient, fiction