When I was 22 my book, Silent Sentinels: the story of Norfolk's fixed defences during the twentieth century, was published. It was number one on the local bestsellers list, and my research won an award from the Council for British Archaeology:

https://www.amazon.co.uk/Silent-Sentinels-Norfolks-Defences-Twentieth/dp/0948400811/ref=sr_1_1?ie=UTF8&qid=1546334407&sr=8-1&keywords=silent+sentinels

I am working on another, nation-wide book, The Armoured Coast.