COWBOY CONSPIRACY (4.5) by Joanna Wayne: Readers are finally going to learn who murdered Helene Ledger in the wrap-up to the Sons of Troy Ledger series — and the revelation is a stunner. Oldest son Wyatt has walked away from his career as an Atlanta homicide detective to return home to solve the mystery of his mother’s murder, even if it means sending his father back to jail. At the same time, he’s protecting Kelly Burger and her daughter from whoever is trying to hurt her. Could it be her recently imprisoned former boss or the man who stole her car? The final story is a satisfying conclusion, deftly plotted with emotional punch and a exceptionally well-executed sense of foreboding.