I suppose there is a bit of a “duh” response to that title. Just buy them. Right? However, both Trinity on Tylos (the Whiskey Creek Press print book) and The Gift Horse (the Booklocker print book) are out of print, although some copies are still available from internet booksellers. Oh, and I have a few tucked into a box in the closet, and I would gladly sell them, but realistically, print is out of fashion these days. I seldom buy print books myself.
Instead of print, there are ways that modern readers can access my novels. Trinity on Tylos (the second, Kindle Direct version) is available for purchase or “free” for those who have a Kindle Unlimited reading subscription. The Gift Horse is available from the Kindle store as well as being available in ebook format from the original publisher.
And I am happy for readers to either buy or read via their Kindle subscription, because I get a bit of cash either way. Yes, my royalties for these are often in pennies, but I have zero expenses, which was certainly not the case when I had to buy books, drive to a venue, sit at a table and then hope someone would want to fork over $15 bucks for an autographed copy. Those were often money losing days!
My other author persona, Pilar Savage, makes more money, and she has never sat around hoping to sell her books, as they are only available as Kindle books via Amazon. The way to success as an author has certainly not changed—write something good enough that someone else will want to read it. But the method of delivery has changed quite a lot since I began publishing fiction.