Book of Second Samuel is also the name of a person, Samuel.

The Book of 2nd Samuel records the highlights of David's reign, first over the territory of Judah, and finally over the entire nation of Israel. It traces the ascension of David to the throne, his climactic sins of adultery and murder, and the shattering consequences of those sins upon his family and the nation.

See 1 Samuel for details on the titles of the books of Samuel. The Hebrew title for both books (originally one) is "Samuel." The Greek title for 2nd Samuel is Basileion Beta, "Second Kingdoms." The Latin title is Liber II Samuelis, the "Second Book of Samuel," or simply "Second Samuel."