Instruct: Classify the given review into positive or negative sentiment.
Query: I couldn't put down until I finished it.

Ivory Hunters was suspenseful, exciting, thought-provoking, and educational. But at the same time, it had a way of making me feel emotionally drawn to the characters, especially to its main character--the ivory-billed woodpecker. Reading this novel made me want to know more because it make me care. I will be first in line when Greg Lewbart's next book hits the shelves.