Rain Forest Relay (Race the Wild #1) by Kristin Earhart

On a once-in-a-lifetime race through the animal kingdom, it takes smarts, strength, and skill to win!

When Russell entered the race, he knew it was going to be a wild ride. Especially the first race course! He'd been studying up on the Amazon's animals and culture forever. But nothing could prepare him or his teammates for what they'd find in the rain forest: raging rapids, poisonous venom, and sneaky competitors who'd do anything to win. Can the red team work together to make it to the finish line in one piece? Each chapter in this action-packed adventure series is bursting with totally true facts about wild and wonderful creatures, dangerous habitats, maps, and more!