Now the acts of David the king, first and last, behold, they are written in the history of Samuel the seer, and in the history of Nathan the prophet, and in the history of Gad the seer,
These three men were prophets. They each wrote books, and of course, we have the books of Samuel, First and Second Samuel, the seer. But we do not have, and of course, even Samuel, Second Samuel wasn't written by him completely. We have the books. We do not have the book of Nathan and the book of Gad. They are lost books.