This is a YA charmer. As such there is a shortness in the book hidden by the larger type and openness of paragraph kerning and spacing. A read that takes but a few short hours to consume.
There is treasure here, but it is hidden, and the telling of the story seems to be only opened like an onion with revealing flashback chapters that come at you in layers. For the younger person this reveal might indeed be just the thing, but for those of us older, we can see where there is a larger, greater amount of detail of the story we are not seeing.
That we would like to explore and learn of, instead of seeing this from the child like eyes of our hero, and his unknown heroine. There are parts of the period and people that are also hidden as the author has done his research but has left it out of the tale seeing that a young person may not want to learn of such. May not need the details that this would show.
In all, worthy of a read and a share if you have young people who you might want to share more of the era with and discuss with them. An introduction to speculative adventure fiction with an historical flair.