A plan formed in my mind. I would explore the places in this land that hid my grail. I would spend a whole year or longer, if that’s what it took, wading through marshes, hiding between mossy rocks, paddling down rivers and swimming in sea lochs; recording my journey through the seasons as I searched for wild otters. Mysterious, graceful, and ever-clever, otters have captivated our imaginations, despite the fact that few people have encountered...