1 Samuel and 2 Samuel were named after Samuel, not only because he is the principal figure in the first book, but also because he anointed the two other principal characters, Saul and David.
Historical commentators tell us that the books of Samuel were originally a single book which was divided when translated into Greek.
The books of Samuel cover a period of time in Israel’s history from the birth of Samuel to the close of the reign of David.
2 Samuel deals almost exclusively with the history of King David and presents a vivid picture of the theocratic monarchy in which the king represents God’s rule over the people.