Kedrigern in Wanderland by John Morressy

From the back cover:

The wizard Kedrigern, connoisseur of counterspells, is now happily married. Well, fairly happily. His bride has confessed that she longs for her own magic wand--and good ones are hard to come by. Homeloving Kedrigern will have to hit the road again in search of the perfect wand--this time with his wife Princess by his side.

Instead of a wand they find a talking sword, once the Princess Louise. Kedrigern sees very quickly why someone turned the Princess Louise into something inanimate, and if he were not such a gentleman, he would have a lot more to say on the subject. But at least she promises to help him on his quest--in return for his help in claiming her lost kingdom.

Home is beginning to look farther and farther away as Kedrigern and Princess contend with a passel of second-rate sorcerers, a three-hundred-year-old curse to which everyone has forgotten the punch line, and the trials of traveling with a whining weapon.