Cozy mystery readers will be delighted to read the latest entry in the Maggie Hope series. In “The Queen’s Accomplice” (print and CD), Susan Elia MacNeal has Maggie working undercover to track a Jack the Ripper copycat, who commits his crimes under the cover of the London Blitz. Maggie’s escapades “never disappoint” (Kirkus Reviews). In “Precious and Grace” by Alexander McCall Smith, Precious Ramotswe, Botswana’s premier detective, helps a young Canadian woman finding a long-lost acquaintance from her African childhood. Smith weaves “a gossamer web” and servers up “properly humble” rewards.