In this second book to The Copernicus Legacy series, four friends, Wade, Darrel, Becca, and Lily, continue to travel across the globe in search of Serpens, the second of twelve priceless relics. There's a lot at stake when Wade and Darrel's mother is kidnapped by the Order, and the fate of humanity hinges on whether or not the relics fall into the wrong hands before it's too late. Danger follows the Kaplans wherever they can be found in their search for the Copernicus Legacy.
This book by Tony Abbot is a good read for ages 8-13. I found this book enjoyable for me as an action, adventure, and mystery fan because it includes all three. I think you should read the first book so you can understand the history of the story, although the author gives a brief overview at the beginning. It has some rough parts, like in the beginning after the car chase, Becca stabs a "goon" because he had Lily over the edge of a bridge. So if you're interested in a wild adventurous story involving mystery I recommend this book to you.