What would happen if you took a PG-13 rated version of Game of Thrones, Highlander, Ancient Greek Mythology, and a splash of unexpected Sci-Fi, and threw them all in a blender?
You'd get this series The Book of Swords by the late, great Fred Saberhagen.
These books move at an extremely brisk pace and are a teenagers dream as far as books filled with action set pieces like Hollywood movies.
These books stand the test of time. It's mind blowing that they were first written in '83.
@Hobyrim Thanks for the suggestion!