As a longtime fan of Piers Anthony's 'Xanth' series, I've spent countless hours diving into its whimsical, pun-filled world. The best way to experience it is in publication order, starting with 'A Spell for Chameleon.' This introduces the magical land of Xanth and its rules, which is crucial for understanding later books.
After the first book, follow with 'The Source of Magic' and 'Castle Roogna,' as they build the foundational lore and characters. The series does have some stand-alone entries and trilogies within it, but sticking to the release order ensures you catch all the subtle callbacks and evolving world-building. Later books like 'Ogre, Ogre' and 'Night Mare' expand the universe beautifully without confusing newcomers. I highly recommend this approach to fully appreciate Anthony's intricate, interconnected storytelling.