Great news! I contacted the chairman of the Friends of Oystermouth Castle to tell him I had finished the first draft of the book, and he invited me to their AGM last night. I also sent him a copy of the book, which he said he would look at before the meeting.
I was the last item on the agenda under 'Any Other Business', but the meeting itself was very interesting, and I have a copy of the plans for the refurbishment and development of the castle over the next few years. They hope to have up to £2.2m to spend, and the plans, especially for the visitors centre in Alina's chapel, are fabulous.
Anyway, I was nervous that they would say that it had been done before, or not be very interested, but the members were great. They all thought it was a great idea, and 12 people have offered to read it - I emailed it to two, and the rest will have photocopies from the chairman. Several people stopped to give me encouragement, and one was a Swansea Councillor, who said he would give me every assistance, and just to ask him if there was anything he could do. He offered to pass the manuscript on to the project manager for the castle development, in Swansea Council. So who knows what will happen.
The chairman was impressed with the book and made some useful comments (like the fact that I spelled 'peninsula' with an r at the end!). I will wait for comment from the others before I start revision. I am much more confident now than I was before.