The Darwath Series: The Time of the Dark, The Walls of Air, and The Armies of Daylight by Barbara Hambly is $4.99 in the US, this is one of Open Road's daily deals so get this fast.
The first book has previously been discounted but for this price its still worth it for the other two
https://store.kobobooks.com/en-us/eb...darwath-series
https://www.amazon.com/gp/product/B0090WTL90
Barbara Hambly’s celebrated trilogy about a murderous force that threatens a far-off magical world and the two ordinary Californians who are drawn into the battle to save mankind
As a student of medieval history, Gil Patterson is a woman familiar with dark stories. She knows the Crusades, the Black Death, and the other horrors of the Middle Ages all too well, but it is another kind of atrocity that has begun to haunt her dreams. She sees forces of evil assaulting a beleaguered kingdom, whose kind people are on the brink of annihilation, and awakes each morning in a cold sweat.