Dragonlance: "Dragon series"
Actually known as "Chronicles." The original Trilogy is:
Dragons of Autumn Twilight
Dragons of Winter Night
Dragons of Spring Dawning
I'd say these are the best books produced by TSR.
then theres some older Gygax novels
Saga of Old City (1st book, Greyhawk) and Sea of Death are awesome. He continued the line with New Infinities.
I'd have to recommend the Hobbit, Lord of the Rings (series) and the Chronicles of Narnia.
Ditto. FYI, The Chronicles of Narnia are MUCH better than the recent, terrible, movies adaptions and, unlike the movies, don't have creepy Christian undertones.
Also check out the Lankhmar books, The Wings of a Falcon by Cynthia Voigt, and anything by Neil Gaiman.