“Till Death Do Us Port,” by Kate Lansing. (Berkley) Dozens, perhaps hundreds, of mystery writers set their stories in Colorado and the mountain states. Here is a sampling of some newer ones. “Till Death Do Us Port,” by Kate Lansing (Berkley Prime Crime) Parker Valentine is ready to pour the wine at her cousin’s reception when the wedding planner turns up dead, tulle from a bridesmaid’s gown wrapped around her neck. Having solved crimes in four previous Kate Lansing mysteries, the Boulder vintner jumps in to find the killer. And, to her surprise, her mother, critical of Parker’s sleuthing in the past, joins her. There is no question that the killer is a member of the bridal party. Suspicion falls on the bride’s mother.