Camp Kids And The Underwater Adventure by Sharon Swain

Brother and sister, Cole and Grace, and their camp friends Jake and Julia are looking for a new summer adventure. On their first day at their camps on the small lake in the Adirondacks, the Camp Kids find something that changes everything. Not only do they discover a whole new world, but they meet new friends and they learn more about themselves and the other people in the woods than they ever could have imagined. Join the Camp Kids on their first underwater adventure.