This book is about my great aunt who spied for the Nazi party 1938-40 before arriving in the UK and was turned. I have been asked to give many talks about it and all have asked where they can buy it. It's not published. It has been edited by Lyn Patrick of the Society of Editors but I still can't get a traditional publisher to take it on. I will keep on trying to keep my customers satisfied. But is there an agent out there who wants 3 chapters?
Well, I want to read about it already! Sounds like a fascinating story. Have you written it as fiction or non-fiction? You could try submitting to agents first or self publish. Either way, I am sure you will attract readers.
Have you thought about trying self publishing? As you already have the ms it shouldn't take too long to be up and selling. Also, you can do print on demand to minimise financial outlay.