Stone Cold by C.J. Box Putnam, $26.95, 370 pages, ISBN 978-0-399-16076-9 For all of the fans who, like me, are mourning the cancellation of the show Longmire by the A&E Network, don’t despair . . . there’s an alternative out there. The novels of C.J. Box, one of today’s “A-list, must read authors,” according to no less of a luminary than world-class author Lee Child, are available to ease