Photographer Josie Iselin, author of Abrams' very popular Beach Stones, has put together a magical collection of 100 heart stones, and each one expresses a universal feeling. A heart stone is one of nature's gifts. Heart stones are not rare or precious in the typical sense--a good scour of a beach with any stones at all will usually turn up one or two heart-shaped stones. But heart stones, lifted from their obscurity, with all...