Maui Revealed was our guide on a 15 day trip to the island only a few weeks ago. The latest edition was up to date, informative and accurate. It led us to some amazing tidal pools near Kapalua that we would never have found on our own.
The book is definitely worth the price for the collection of facts that it, well, reveals. It is thoroughly researched, honest and generally interesting to read.
When it comes to editorial commentary however, caveat emptor. Be wary of suggestions that may make you unpopular with the locals or that may even be legally questionable. For example, the lava rock formation called "Dragon's Teeth" in West Maui is highlighted as an attraction near Kapalua. What is glossed over in the book is that to get there you must park in a private parking lot owned by the Ritz-Carlton, walk across a private golf course (watch out for errant tee-shots, no joke!), and then encounter a sign indicating that the area is actually known as Makaluapuna and is cultural preserve containing an ancient burial ground. (See this article [...].)
Similarly, the section outlining the stops along the road to Hana suggests that you climb over fences on private property to access the "publicly owned" property on the other side. Many of these fences are labelled "No Entry" or "No Trespassing". Since my guess is that most travelers to Maui do not pick up a copy of the county's land and parcel records, it is not clear if Maui Revealed is to be trusted in these instances.
On multiple occasions we had locals ask us if we had "The Blue Book" or just "The Book". Their opinions were generally neutral or negative, for a variety of reasons. The controversy surrounding the book is nicely summarized by an article by Chris Hamilton on the Maui News website: [...].
Ultimately, I must recommend this book because it is so thorough and informative, but do not let it be an excuse to travel without any respect for the place you are visiting.