As I wrote earlier, I found the conclusion to The Last Guardian of Everness. This 2-book set is a fantasy novel with a few SF touches set in modern America. And because it is set in modern America you inevitably learn about the results of dragon/fighter jet battles. If that disconcerts you too much you won't like the book. I found it a bit disconcerting myself, not least because I think he overestimates the capacity of their weapon pods. And there are (also inevitably, and only obvious because of the American context) a few comments on the political scene--relevant to the story, though. And political or religious comment is par for the course in the genre; sometimes even overwhelming--yes, I'm talking about Katherine Kurtz.
The story mixes Oberon, Prometheus, fallen angels, Lovecraft and even a touch of Lewis and Wagner with Celtic legends and Freemasons of the USA and the Grail. Several of the characters start the second volume dead.
A gripe or three: The mouse intro is a huge tone change. I don't think he plays fair with the problem of the ring. The modern battles don't ring quite right. And the kelpies don't come off quite right either.
Recall that Everness is the border between real and dream--otherwise some things seem unmotivated. Acheron is rising (think R'lyeh meets Dis) and time is running out. Sound the horn for the end of the world, or not? Who is who, and what mythic figures are they presenting to the world?
My eldest would have probably figured out a few of the forgotten secret names quicker than I.
One measure of the quality of a story is: do you want to find out what happens next? I did. And I recognized myself in one of the characters.