Lost in Shadow — Jocelyn Kelley

Her dear father died before convincing people of the existence of ghosts, so Jade Nethercott and her sisters set out to prove him right. Meanwhile, a ghost named Renshaw reveals to Jade his murderer's identity -- Lord Bannatyne, notorious rake -- so that she might protect Renshaw's fiancee. A nervous Jade finagles a meeting with Bannatyne, but he proves to be anything but rakish when he risks arrest rather than ruin Jade's reputation. Now she must decide whether to heed the ghost's warning -- or follow her heart...