Thanks, Svalbard -- I might look that up. haven't ever read Treece yet. The novel I'm looking to read first, dealing with some of the persons and events of King Harald's Saga, is Hope Muntz's The Golden Warrior.
I will check that one out. It has some polarising reviews on Goodreads which I always find to be a good thing. Another book that is quite brilliant and features Harald in a memorable scene and if might presume written in a style that you might enjoy is King Hereafter.
Have started a book I bought on 28 June 1975 from the long-gone, fondly-remembered Bartlett Street Book Store in Medford, Oregon, for 50c, an old, cheaply-made American printing of H. Rider Haggard's Mr. Meeson's Will.
Here's something about this forgotten novel, with spoilers. I'm not reading it through yet myself, butu I do remember having read about the very odd location of the will already.
Curiously, it belongs to the ten-year period that Haggard himself regarded as his best. Look at some of the other books Haggard wrote around that time! Meeson must've been something knocked off in a few weeks between efforts on far better books -- specifically nos. 4, 5, 7, 11, 12, 15, 16, 17, 18