"Twins Becky and Alex can't wait to go on vacation to the ocean - especially as they're taking their loveable puppy, Cooper, with them. Cooper loves running along the beach, playing in the waves and digging in the sand. All these new things are even more fun than chasing squirrels! And Becky and Alex are looking forward to taking him out on their own for the first time ever. But their walk along the cliffs turns out to be even more of an adventure than anyone could have imagined ..."--Back cover.