By AMY STUMPFL For Brentwood Home PageLocal author M.K. Gilroy marked the release of his first novel, Cuts Like a Knife, this spring. But you wouldn’t exactly call him a rookie. In fact, Gilroy – who has lived in Brentwood since 2006 – has racked up more than 30 years in the publishing industry, handling everything from packing boxes and proofreading to managing editorial departments and developi…