I can't recommend Terry Brooks in general, but his Genesis of Shannara
series, beginning with Armageddon's Children
, was a fairly original fantasy/post-apocalypse/contemporary mash-up. You don't need to be familiar with the Shannara
books, but the first one was basically as blatant a Tolkien knock-off as one could produce without simply re-typing the text, with the exception that the medieval setting, complete with dwarves, gnomes, trolls and elves, was said to have come about as the result of a Great War fought with technologies that wiped out nearly all life and reshaped the land.
Genesis of Shannara
, as you would likely guess, is the story of the apocalypse that turned our world into Middle Earth. It's set 2-3 generations after the fall of civilization, which started in the '90s, apparently
There's still some advanced technology sitting around, but most people (and other things) are living on a tribal level, or in armed compounds. If you don't mind some elves and demons getting up in there with your robots, zombies and lizard people, it's a fun ride.
For this series and the preceding Word & Void
, he's borrowing heavily from Christian mythology without referencing it explicitly, but not such that I, as a non-Christian, found it remotely preachy, and probably not in a way that would offend most Christians, either. Like pretty much all of Brooks' work I've read, I wouldn't pigeonhole it as YA, but it is predominantly PG-13.