Instruct: Classify the given review as either positive or negative.
Query: Very Disappointing

I had high hopes for this book, and expected a first rate Tarzan adventure, like Farmer's "Lord of the Trees". Instead, the book wanders all around with no focus. Tarzan goes through earthquakes, floods, uninteresting lost cities, encounters with weird little half-men, etc etc etc. None of these are important to whatever story there is, and after awhile, I got tired of trying to make my brain believe there was a story there. As an attempt at a Tarzan story, it falls flat. Even Tarzan's character is off-kilter. Tarzan is completely reactive through the whole story, instead of the proactive hero we are used to. Well...I will keep The Lord of the Trees and A Feast Unknown, but The Dark Heart of Time is going straight to the used bookstore.