Jake Maddox 
Obstacle Challenge [PDF ebook] 

Tanisha Carter can’t believe her luck when she finds out her favorite extreme obstacle course challenge is coming to her town. She needs a partner to compete, so her video game pal, Derek, agrees to team up with her. Derek is big for his age, but strong, and Tanisha is sure their combination of speed and strength will make for a winning team. But when training reveals Tanisha’s fear of heights, the pair realizes they have more than one obstacle to overcome in this extreme challenge.