The Grinning Tun is a sea shell, plucked from the sands of a faraway tropical shore. But this is a sea shell with a difference. It will not stay put. Shove it in the warming oven and, next morning, it sits on top of the stove. Bury it in the ground and it is found in the root cellar. And it grins. It thinks of the possibilities.In the 1990s, Kaye Eliot comes to Acadia Creek to spend a quiet summer with her two children. But instead of passing stress-free...