Well Bonesie. Happy Birthday!
So....if getting a book published was easy, there would be a lot more books!!!
When I sat down one January to start on my Morgan book, with a blank screen, I went ahead on the basis that I would self publish on line. That was my simple ambition.
As the concept slowly emerged, I talked to a friend, who is a successful author in the motoring field. He suggested a couple of publishers. I sent a brief note to one of those, but got a cool response. The irony was that after six months he came back "interested" but by then I had signed a contract. My friend put me a word in at the second publisher, who had done a few of his books. And I made contact to discuss options.
This publisher prefers ideas rather than part completed books. Anyway, to cut a long story short, I signed a multi page contract, which was VERY specific. It had to be written in their corporate style. They chose the title, which had to fit with their other volumes on motor vehicles. There was a full page guide on their preferred grammar, and how to write numbers and create tables. There was a prescribed number of words, and number of images. The images had to be to a specified standard and with signed authority from the photographer if not my own. And a deadline for delivery.
I rewrote it about six times, and around 25 photos had to be retaken, in a few cases meaning I had to partly dismantle my Roadster!!!
All I can suggest is that you find publishers who deal in books similar to the one you have, and send a few e-mails. Good luck with it!!!