This is a hardback collection of the first four Myth Books: Another Fine Myth, Myth Conceptions, Myth Directions, and Hit or Myth.
The book was tremendous fun when I first read it, and it made great comfort reading while visiting Grandpa and spending long hours in the hospital. There are a number of puns, but less wacky than most of Piers Anthony’s Xanth novels. I prefer them– and they vanish at quite a clip as the hours pass by.
The whole series is listed here.