For people who enjoy Piers Anthony's Xanth series (along with good and bad puns), here is a complete list of the titles (to date.

I know when I find an author I like and a series I really enjoy, I want to find all the titles.  I also prefer to read them in 'order' when possible, so as not to have earlier things 'spoiled' when referenced in/by later books:

 1 A SPELL FOR CHAMELEON - Del Rey PB 77
 2 THE SOURCE OF MAGIC - Del Rey PB 79
 3 CATLE ROOGNA - Del Rey PB 79
 4 CENTAUR AISLE - Del Rey PB 82
 5 OGRE, OGRE - Del Rey PB 82
 6 NIGHT MARE - Del Rey PB 83
 7 DRAGON ON A PEDESTAL - Del Rey PB 83
 8 CREWEL LYE - Del Rey PB 85
 9 GOLEM IN THE GEARS - Del Rey PB 86
10 VALE OF THE VOLE - Avon PB 87, TOR HC 2000
11 HEAVEN CENT - Avon PB 88, TOR HC 2000
12 MAN FROM MUNDANIA - Avon PB 89, TOR HC 2000
13 ISLE OF VIEW - Morrow HC Avon PB 90
14 QUESTION QUEST - Morrow HC Avon PB 91
15 THE COLOR OF HER PANTIES - Avon PB 92
16 DEMONS DON'T DREAM - Tor HC 93
17 HARPY THYME - Tor HC 94
18 GEIS OF THE GARGOYLE - Tor HC 95
19 ROC AND A HARD PLACE - Tor HC 95
20 YON ILL WIND - Tor HC 96
21 FAUN & GAMES - Tor HC 97
22 ZOMBIE LOVER - Tor HC 98
23 XONE OF CONTENTION - Tor HC 99
24 THE DASTARD - Tor HC 2000
25 SWELL FOOP - Tor HC 2001
26 UP IN A HEAVEL - Tor HC 2002
27 CUBE ROUTE - Tor HC 2003
28 CURRANT EVENTS - Tor HC 2004
29 PET PEEVE - Tor HC 2005
30 STORK NAKED - Tor HC 2006
31 AIR APPARENT - Tor HC 2007

(Based on information from the author's official website, hipiers.com)