I wouldn't recommend it for absolute beginners, but more for those in between beginner to intermediate and anyone else above. This is NOT a guitar lesson book.
It's got really helpful tips for furthering your music knowledge and skill by using a more practical approach (the experiential) with lots of helpful tips to use in improvisation and exploration and presented in a legible and creative format.
Lastly, this is Vai's system, and if you're a fan, you'll already be more motivated to read and absorb whatever you can from the book!