Again, there are small problems that make this book less than five-star. The romance is lacking; Ms. Allen concentrates more on wrapping up the entire story instead of working out a realistic plot. Other small plot inconsistencies make you sit up and think, "Wait a moment! That's not right!" (i.e., how the heroine knows the ghost's name though she was never told). And the ending is ridiculously abrupt.
On the other hand, "The Passionate Ghost" has Ms. Allen's most compelling opening chapters of any of the books. And the characters stay consistent and likeable throughout the book. The book does nicely wrap up the entire plot and explain most of the questions lingering from the previous books. Overall, it is a satisfactory conclusion to a very fun series.