John Locke uses 35,000 words to explain what could be taught in approximately 6,000. The book is mostly padding. The three central ideas he pitches are useful and will be valuable to a lot of self publishers, though two of the three are already matters of common practice.
Verdict: it's worth the $5, but it's not the goldmine it positions itself as. Approach it with moderate expectations, and you won't be disappointed.
His fiction, though, is really kick-ass :-)