Most of the world’s ocean floor remains to be discovered. In fact, it’s estimated to be home to over 3 million sunken vessels and countless treasures of the past. This enthralling and adventure-filled nonfiction book for young readers recounts some of the most captivating shipwrecks from history, ranging from the , a Chinese merchant ship laden with riches from the 14th century, to the HMS and , two polar exploration ships that mysteriously disappeared in the early 1800s. Combining new research, stunning archival material, and vivid storytelling, dives deep into the world of marine archaeology and shows young readers what each discovery reveals about the world before our time.