Stephen Donaldson’s 3 Thomas Covenant series (First Chronicles, Second Chronicles, Final Chronicles)—3 books in each set. Lots of sci-fi/fantasy along the lines of Tolkien, but with a modern twist...he also wrote futuristic sci-fi space operas, which I really didn’t care much for, but some people seem to like it.
Anne McAffrey’s PERN/Dragon Riders series (many many books) which her son has now taken over writing. Again, sci-fi, some space opera stuff, fantasy stuff. Very good series too!
Of course, pretty much everything by Ray Bradbury.
Absolutely! Second only to Tolkien IMHO.
Anne McAffrey’s PERN/Dragon Riders series
I will second that one too, at least the first 6 books...
Paul O. Williams "The Pelbar Cycle" Is another good tale.
David Eddings "Belgariad" is yet another, while simple and straight forward, it is excellent and easy to read.
Piers Anthony is a bit bent, but his "Blue Adept" is worth a look.