I first encountered McKillip's work when I found Heir of Sea and Water, the second volume of the Riddlemaster of Hed trilogy in a drug store while attending an archaeological field school in Elk Point, Alberta. The Riddlemaster series now ranks right up there with Tolken's Hobbit/LOTR books for me, and McKillip the only fantasy writer whose works I always bought as soon as they came out.My post on her novel Fool's Run appears here:
https://ajaggedorbit.blogspot.com/2016/03/fools-run-by-patricia-a.html
Other links
https://locusmag.com/2022/05/patricia-a-mckillip-1948-2022/
https://www.tor.com/2022/05/11/patricia-a-mckillip-1948-2022/