Book excerpt: A hilarious picture book from Underwater Dogs author and photographer Seth Casteel--just in time for summer! You're invited to the splashiest, splashiest, doggone friskiest celebration of the summer--a puppy pool party! Join dozens of pups as they paddle, dive, and cannonball the day away. This irresistible new Underwater Dogs adventure from bestselling author and photographer Seth Casteel is packed with never-before-seen photos of partying pooches, as well as old favorites, that prove just how much fun a day at the pool can be!