Karen's Island Adventure (Baby-Sitters Little Sister, No. 71)

Spending spring break at a resort in the Caribbean, Karen explores caves, hunts for seashells, and goes snorkeling until she meets Sandy, a quiet and seemingly standoffish seven-year-old who has an unhappy secret When Karen And Her Family Visit A Tropical Island, She Makes A New Friend Who Seems To Be Afraid Of Any Activity Because Of Her Open Heart Surgery A Year Ago.