Reddit reviews A Year in a Castle (Time Goes By)

I hope you get some interesting replies to this. You probably need to clarify your meaning though; "castles from kingdoms".

For most of human history, Castles were more like a fortified house at the center of village, often where the villagers could take shelter if there was an attack. The vast majority of castles have very little living space square footage compared to what we see in movies. The walls surround a large interior space that is busy during peace times and haphazardly crammed with villagers during a siege.

There would have been a considerable amount of smaller, wooden structures that sprawled out and around the castle to provide support. Having cooking fires, and slaughter houses, and rodent attracting grain stores, and access to fresh water, and stables for animals, and facilities for disposing of animal waster, and space for hundreds of employees to sleep and live, all would happen outside the castle walls. Think of a castle instead as a center point of a large village and it's more likely to be an effective way of thinking about it.

That said, buy this book, https://www.amazon.com/Stephen-Biestys-Cross-sections-Castle-Biesty/dp/1465408800/

Despite it seeming being "for kids" it will probably have more info than any committed amateur might need to suss out what's going on in a castle.

Others that also look interesting.

https://www.amazon.com/Castle-Eyewitness-Books-Christopher-Gravett/dp/0756637694/

https://www.amazon.com/Year-Castle-Time-Goes/dp/1580137962/

A Year in a Castle (Time Goes By)?