This exciting adventure recreates the siege of Masada, and reveals important developments in Jonathan's struggle with his guilt over past events.

Also, there's terrific insight into the workings of the Roman legal system in a page-turning court room drama.

As ever, Caroline Lawrence spings new surprises for all the characters and provides motives, means and opportunities for one determined felon. And, as ever, it's up to the four young detectives to crack the case.