So a recent discussion of Andre Norton sparked an impulse to reread the first five Witch World novels, for old-times sake.
I have just finished the first in the series, not surprisingly entitled Witch World: in which a man from our own Earth, Simon Tregarth, is transported to another world, one in which (he is told before he departs from ours) "his spirit, his mind—his soul if you wish to call it that—is at home." World-weary former soldier on the run as Simon is (with hints perhaps of work as a spy, and also a reluctant criminal), the world where his tenacity and keen instincts for survival are "at home" turns out to be a war-torn land . . . but also to the science-fantasy readers' delight, a world where magic exists, but also alien science.
I loved these when I was a young woman. As an old one, I did initially find it difficult to get into the story, but that may be because I was tired, or other things distracted me . . . or maybe the book is a slow starter. Whatever the case, by about halfway through I was hooked on the story and characters: Koris the dispossessed, the unnamed witch who often becomes Simon's partner on perilous missions, and Loyse of Verlaine, running from a cruel father and what would likely be an even crueler marriage to an utterly ruthless man. Described in brief, these characters do sound stereotypical, but the book was published in 1963 and no doubt inspired a lot of characters and books written between then and now.
Now that I have finished it, I will very soon (probably before the end of the day—it's still early here) be starting on the second in the series.