In 1890 Washington the only family Joseph Johnson has left is his half-wild Indian pony, Sarah, so when she is sold by a man who has no right to do so, he sets out to get her back--and he plans to let nothing stop him in his quest.

"It's been two months since the Kaplan family hunted down the Serpens relic, but when the evil Galina Krause suddenly and violently reappears, Wade, Darrell, Lily, and Becca have no choice but to face her again. Now they must race to find an artifact said to be crafted by Leonardo da Vinci himself--perhaps the strangest Guardian of all. Along the way, they uncover another layer to Galina's sinister endgame . . . and there might not be enough time...

"Wade, Lily, Darrell, and Becca fly from Texas to Germany for the funeral of an old family friend. But instead of just paying their respects, they wind up on a dangerous, mind-blowing quest to unlock an ancient, guarded secret that could destroy the fate of the world"--Provided by publisher.