Collection of audiobooks 1-32 for the Xanth series, by Piers Anthony:

1	A Spell for Chameleon	1977
2	The Source of Magic	1979
3	Castle Roogna		1979
4	Centaur Aisle		1982
5	Ogre, Ogre		1982
6	Night Mare		1983
7	Dragon on a Pedestal	1984
8	Crewel Lye: A Caustic Yarn 1984
9	Golem in the Gears	1986
10	Vale of the Vole	1987
11	Heaven Cent		1988
12	Man from Mundania	1989
13	Isle of View		1990
14	Question Quest		1991
15	The Color of Her Panties 1992
16	Demons Don't Dream	1993
17	Harpy Thyme		1993
18	Geis of the Gargoyle	1994
19	Roc and a Hard Place	1995
20	Yon Ill Wind		1996
21	Faun & Games		1997
22	Zombie Lover		1998
23	Xone of Contention	1999
24	The Dastard		2000
25	Swell Foop		2001
26	Up in a Heaval		2002
27	Cube Route		2003
28	Currant Events		2004
29	Pet Peeve		2005
30	Stork Naked		2006
31	Air Apparent		2007
32	Two to the Fifth	2008