“Glasshouse Children," Sam Williams (Mercury Nashville)Sam Williams, the grandson of country music legend Hank Williams and the son of recording artist Hank Williams Jr., wastes no time on his debut album “Glasshouse Children” convincing the listener of one thing: He sounds nothing like his kin and he’s not trying to.This is a good thing for Williams, as the handful of slow-paced reflective songs fit his own voice and vision nicely.“Glasshouse Children” explores themes of happiness, despair and