The Most — Jessica Anthony

From “one of our most thrilling and singular innovators on the page” (Laura Van Den Berg), a tightly wound, consuming tale about a 1950s American housewife who decides to get into the pool in her family's apartment complex one morning and won't come out.
 
It is an unseasonably warm Sunday in November 1957. Katheen, a college tennis champion turned Delaware housewife, decides not to join her flagrantly handsome life insurance salesman husband, Virgil, or their two young boys, at church. Instead, she takes a dip in the kidney-shaped swimming pool of their apartment complex. And then she won't come out.
 
A riveting, single-sitting read set over the course of eight hours, THE MOST breaches the shimmering surface of a seemingly idyllic mid-century marriage, immersing us in the unspoken truth beneath. As Sputnik 2 orbits the earth carrying Laika, the doomed Soviet dog, Kathleen and Virgil hurtle towards each other until they arrive at a reckoning that will either shatter their marriage, or transform it, at last, into something real.