This well written cozy by Alice Kimberly, aka Cleo Coyle of the Coffeehouse Mystery series are the pen names for Alice Alfonsi, who writes with her husband, Marc Cerasini, was a joy to read. It's the third in the Haunted Bookshop series. There isn't much in the way of character development or growth, except Penelope Thorton-McClure is standing up for herself more, especially with the help of her invisible friend, Jack Shephard, P.I., the Ghost in the series. She is learning to no longer take any McCrappe from bullies of all sorts. She has a great set of oddball friends who have helped in the past with solving mysteries. This story revolves around a set of books of Edgar Allen Poe stories, the set is supposed to have a code leading to a treasure. This, of course, leads to...duhn-duhn-duhn..... murder.
If you let yourself go with the flow and don't get wrapped around the axle that Pen can talk to Jack in her cranium, even take him with her outside the shop so long as she has a buffalo nickel he used to carry, and even goes on capers with him in her dreams, then you will definitely enjoy this series.