Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: A Call to Courage

Once again corraling his skills in sci-fi-ish mysteries, Jerry has provided another title with a deeper purpose. That's to cause readers to ask how valuable they regard their faith in the God who's promised to put a punctuation mark on the end of history. Jerry's books are in a league by themselves. Yes, he crafts page-turner novels. But he also forces us to put ourselves in the characters' shoes and ask what we'd do if our lives depended on what we believed as eternally true.