Maybe try an autobiography? It’ll help the believeability presumably. Depends who/what you’re interested in though
Not quite an autobiography but this is a great read if early punk is your thing… https://www.worldofbooks.com/en-gb/products/please-kill-me-book-legs-mcneil-9780802125361
A couple of mostly highly amusing books worth reading imo... Not an autobiography, but Melvyn Bragg did wonders with Richard Burton's notebooks... https://www.amazon.co.uk/dp/1444789163/?tag=not606-21 plus... https://www.amazon.co.uk/dp/0712657681/?tag=not606-21 Also, a few bad boys in the following... https://www.amazon.co.uk/dp/1848090188/?tag=not606-21
I'd second Chicken hawk and also recommend Apache by Ed Macy. It's about the use of Apache helicopters in Afghanistan from the perspective of the pilots and it recounts the story of the famous Apache rescue mission of a wounded infantryman that has recently been covered on a TV show
Best autobiography I've read for a while was O Brother by John Niven. If I was holed up in a country cottage in autumn I'd recommend a Kevin Barry novel, The Heart in Winter or Night Boat to Tangiers.