Steve,
I am still amazed at the work that you, the OP Steve5, and many others on this site can do. I'll never be in your league but it's a lot of fun attempting to build these kits so onward I will go.
When I first started building models again after a 50+ year hiatus, I began accumulating my stash and some books as well. The few books on ships that I've bought in the last 5 years were usually mentioned on this site ... mostly by folks knowledgeable in things nautical such as John Tilley. He may not have recommended all the books I have on the subject but he's the guy I trust to point me in the right direction for references.
Most of the books in the photo I'm attaching were bought used. A few were new. I consider it a good investment.
Mike