Complex sentence: During World War II, while in the Coast Guard, he coauthored with professional wrestler Bernard J. Cosneck, "How to Fight Tough", which instructed Coast Guardsmen on close-quarters hand-to-hand combat incorporating boxing, wrestling, and jiujitsu.
Split into simpler sentences: During World War II while in the Coast Guard, he co-authored "How to Fight Tough" with professional wrestler Bernard J. Cosneck. The book was used by the Coast Guard to instruct guardsmen on close-quarters hand-to-hand combat while incorporating boxing, wrestling, and jiujitsu.