There are many short articles about Princeville, what to see and how to enjoy your stay, but most of these are of general interest and do not offer specific, practical advice the reader can mull over while descending into Lihue.  

Nor are there any large texts on Princeville itself—with a population of under 2000 and an economy centering fully around resort living, this is not a surprise.

Hidden Kauai: Including Hanalei, Princeville, and Poipu
is an excellent starting point.  Exactly 200 pages in length, Hidden Kauai prides itself on its discovery of lesser known attractions and restaurants, reviewing more than eighty eating establishments and another seven dozen hotels plus seven maps.   

If you judged books by their cover, the Kauai Trailblazer: Where to Hike, Snorkel, Bike, Paddle, Surf would be purchased well before any Signet Classic.  Using the Princevillianous tactic of attracting potential consumers through pretty natural scenery, the cloudy, canyony cover of this very recently released (July 2014) Trailblazer paperback snapshots a thousand words worth of why you must uncover Princeville and greater Kauai by yourself.  As for the content, it’s a good 250 pages of hikes and strolls in mountains, reefs, and beaches and lists of shops, restaurants, and museums—basically a whole lot of Kauai, much a trip away from Princeville, though a lot in the town itself.   

The Ultimate Kauai Guidebook: Kauai Revealed
is similar stuff in the same amount of pages.  Both make excellent pre-travel reads.