Everything will be perfect, except ... First, it is written large with questionable illustrations and an even paper; 15 for it is a bit expensive. Then there is a nano glossary at the end of the book, but many terms are never explained. Finally, the work sometimes lacks a bit of depth, especially when (as anyone who is not medievalist formation) is bombarded since childhood by stereotypes and pre-conceived (or not Hollywood) screws Screw the Middle Ages. Finally, it is sorely lacking quality cards (these cards range from fair to simply shameful, copied CM2 level of 25 years ago matter graphic quality and educational quality) and modern artwork for specific explain certain points ( weapons, clothing, etc.).
The same book a little less falsely airy with a slightly higher quality paper, illustrations least some useless, good illustrations and more, text and more to explain some concepts and missing define obscure terms, and it would be perfect.
That said, for his goal, I do not know better.
When is a second edition?