Reddit reviews Castles of the Welsh Princes

I haven't come across many that I've thought worth reading, unfortunately. Those that are readily available at bookshops tend to be reference works with a few paragraphs (or a page or two for the larger castles) set aside for each. That may be exactly what you're looking for, but they all tend to retread old ground - ground I'm already familiar with.

I did appreciate Castles of the Welsh Princes for its slightly more focused scope and the wonderful reconstructions it provided for some of its castles.

The website Castles of Wales is, despite its aged appearance, a great resource that covers everything you're likely to get from such reference books and then some.