Kliff's Edge - When Dogs Won't Dig by Illise Montoya

May Kliff is a genderqueer freelancer who specializes in helping others with strange cases. When she's contacted by an animal unit to catch a dog who has evaded capture a remarkable number of times, May's not sure whether to be insulted or amused—until she learns the dog still managed to evade dog catchers even after being hit with a lethal dose of elephant tranquilizer. Intrigued but still wary, Kliff takes the case, just as her misfit older brother, Max, turns up on her doorstep after years of estrangement. Setting aside their differences for the time being, the odd sibling team work together to investigate the case, only to find the truth is buried so deep—it touches the after life.