An unsettled marriage takes a sinister turn in this novel of domestic suspense. It's "pure gold" (Los Angeles Times).   Winner of the Yorkshire Post Author of the Year Award   In a quiet English village, Nadia is a sculptor driven by an obsession to conceive a child. Creating is in her blood. Her husband Simon is a geology professor and spelunker determined to finish a project beneath the earth's surface that has already killed one man.   Each consumed by private passions, the two live a blinkered coexistence, until Nadia makes an unsettling discovery: Simon's former girlfriend, Celia, is pregnant. But if Celia's husband is sterile, then who has made Celia such a happy and intolerably boastful mother-to-be? For Nadia, the answer is the ultimate, unforgivable betrayal. Now, as Simon's job takes him into the deep unknown, Nadia descends into darkness as well. And before the night is over, everyone is going to pay.   "Before Gillian Flynn, there was Lesley Glaister," says Harper's Bazaar, and in Limestone and Clay, she once again mines the horror of love as "a jangle-nerved young married couple cook their respective obsessions to a nightmare boil" (Kirkus Reviews).