What is lord of seas?

As an AI language model, there is no record of a book or movie called "Lord of Seas." However, "Lord of the Seas" is a title given to various gods and mythological figures associated with the sea, such as Poseidon in Ancient Greek mythology. Additionally, there are some books and TV series with titles similar to "Lord of the Seas," such as the "Sea Lord Chronicles" series by Joni Parker, which is a fantasy series about a young woman who becomes the ruler of a powerful seafaring nation.