Not too high brow for the everyday reader to pick up, but still highly detailed and informative.
I've not tried out any of the recipies yet, but even without any of these I would consider it an essential book for medieval re-enactors and anyone with an interest in the period, particularly in aspects of architecture and cooking.
If you like castles, and thinking about how they actually worked when intact, this book will give you food for thought (excuse the pun!). There are numerous diagrams showing how the various kitchens / ovens / and other rooms in a castle fitted and worked together - for many specific castles in the UK. Look around your favourite again after reading this book and you will see it in a completely different light.
I have read the book right through initially, and envisage dipping in and out in future when I want to recreate something specific, visit a particular site or just top up my knowledge.
Definitely one to keep on the bookshelf, or even closer to hand.