"Twelve-Foot Circle: A Mystery Based On Everyone's True Story" - by Richard Schuette.
His parents dead in tragic accidents, no family or friends for
support and his marriage failing, millennial Jack DuMot has learned to
maintain control by hiding within the walls of a brick bungalow in a
quiet South Minneapolis neighborhood; staring out the window at a future
of doubt, disappointment and failure. His calculated, measured world is
thrown into turmoil when he steps through the doors of a small curling
club on the edge of a frozen Minnesota farming town. There he discovers
that ending a deadly string of seemingly random events will mean digging
through the deep roots of dark family secrets. With attractive and
engaging former co-worker Tina Buchholz at his side and unnamed danger
in the rearview mirror, Jack enters the world of Midwestern curling
clubs and championship matches played at the highest level of the sport -
in search of something he never knew he lost.