I wondered for a long time if there would be another book in this series, so I was delighted when I found this. This time around David and Josie have gone to London during the Blitz to save their friends. There were many, many red herrings and a lot of wondering whose side various characters were on. Historically the story felt fairly accurate, but there were a couple of loose ends they were not tied up to my satifaction and some questions about various characters behaviour, but a apart from that a great addition to the time travel whodunit series.