The Ultimate Opponent - Dojo Rats, Bk 3 Author:James Raven As the Dojo Rats prepare for their belt test, hoping to move to the next level of their karate practice, they discover that an old waterfront freighter has been dumping chemical waste into the bay--and framing a local sailor for the deed. The Dojo Rats come to the sailor's rescue, but not without sacrificing their own personal gain.