‘Payback’ continues escapades of PI Sunny Randall Ray Walsh "Payback" by Mike Lupica (Putnam, $28) is the latest book showcasing Boston private investigator Sunny Randall. It's the ninth book in the series that was created by bestselling author Robert B. Parker. Hard-working, quick-thinking Randall gets involved in two cases, set in post-COVID 19 times. Her best friend Spike has lost his restaurant/bar to Alex "Ace" Drysdale, a devious, opportunistic hedge fund manager who loaned him money during the health crisis. Due to the unrealistic terms of the contract, which he didn't fully understand, Spike defaulted on the loan - and goes to Randall for help.