The penultimate book in the Trebizon series. Having been pleased to discover the rest of this series from my childhood I am now sad about having to finish it for good with the next book after the best part of thirty years! I thought this one was as good as I remember any of the earlier ones being. Even as an adult I couldn’t figure out how the letter mystery central to the book was going to be happily concluded which was nice. It’s a huge nostalgia kick reading these.