I read the first books in the Vicky Bliss series years ago and have chuckled and cheered my way through them several times since. When I heard that there was a final book, I couldn't wait to read it.
Well, it was worth the wait! Besides Vicky, Schmidt and John, Feisal of "Last Train to Memphis" makes an appearance as do other characters from previous books. Even the author herself has a brief scene.
There is a tie in with the Amelia Peabody books that rounds out the end of both series.
Do yourself a favor and read your way through the Elizabeth Peters books as soon as possible!!