Two novels that weave energy and ecology into their plots. Heat and Light by Jennifer Haigh is a “tour-de-force” about a fictional coal town where the mines are closed and the money is gone.   That is, until it is discovered the town is sitting atop a massive deposit of natural gas. In The Quality of Silence by Rosamund Lupton, a woman and her daughter arrives in Alaska seeking the whereabouts of her husband.  Her search runs afoul of dangerous enemies intent on covering up an environmental catastrophe in this “tight, claustrophobic thriller.”