The first trilogy of Katherine Kurtz’s Deryni books. I particularly like this trilogy; I first read it when I was younger (in my teens, I think), which helped me empathize with Kelson.
The most recent reread of this series followed the last book of the Childe Morgan Trilogy, which was (in the world of the book) the events a dozen years before this book begins.
Deryni Rising was the trilogy’s first book. It’s set in the court of Gywnedd; Kelson Haldane’s father is killed in the first few pages. The book is about Kelson’s struggle to take over; he’s only 14. He’s also the crown prince, heir to magic powers passed down from his father… but even those are complicated.
The world building is extremely engaging. As the first book, some of the specific flavor is contradicted or presented differently in later books, but it’s pretty subtle. (Basically, the magic feels more like a wizard in this book, but more like psionics as the series evolves.)
The church is prominent and a source of divided loyalties. I really appreciated the role of the church; it helped this fantasy world feel very “low magic”… even though Deyrni powers prove incredibly useful and powerful.
Deryni Checkmate continues the trilogy. It’s a traditional middle book of a trilogy, in that the victory of the previous book is complicated and new problems crop up. We learn a lot more about the deryni and their powers–in part because Morgan and Duncan use their powers more generally.
The world that’s sketched is nuanced and very complicated; Kelson’s struggle to balance his many obligations is well done. Of course, nothing’s truly resolved… other than a tragedy in the wings.
High Deryni reveals Gwenydd’s rotten underbelly; there’s yet more treason. Things do get worse before they get better. The ending features a very surprising twist that’s indirectly foreshadowed.
This is a book of war and war-magic. We learn about Torenth and its king… and more about the Camberian Council. The book is urgent, but the pace isn’t a headlong rush.
I love the trilogy for the way they build a world that’s not too far from medieval England/Europe. There are some significant differences, but they’re largely grounded in the specific politics and relations of the region. The people feel… as correctly full of superstitions and prejudices.