While I enjoyed reading this book, I found it to be somewhat slow going. Captain John Staple was very entertaining, but I felt like I never got a particularly good feel for Miss Nell. Certainly their relationship came about rather faster than I really think is possible, but that's likely as not a reflection of the genre.
The mystery (or rather, mysteries) within the book was interesting, but I did get a bit frustrated when it seemed like certain facts were being withheld from the reader in order to increase the mystery. There was enough to piece things together at the end, but during the process of the story I felt as though I was being led about.