Please see 1 Samuel, an introduction and outline for a discussion of 2 Samuel’s composition and themes.
An Outline of 2 Samuel, from Birch and Gunn:
A. David’s Kingdom Established 1:1-8:18
I. 2 Samuel 1:1-5:10 David Becomes King
1:1-27 The News of Saul’s Death
2:1-5:5 The Gift of the Kingdom
II. 2 Samuel 5:6-8:18 David Consolidates His Kingdom
B. 2 Samuel 9:1-20:26 David’s Family and David’s Throne
9:1-13 Mephibosheth, Son of Jonathan
10:1-12:31 War, Adultery, and Murder
13:1-14:33 Rape, Murder, and Exile
15:1-16:14 Rebellion and Exile
16:15-17:23 Debate, Message and Escape
17:24-19:8 Battle, Message, and Mourning
19:9-20:3 David’s Return
20:4-26 The Aftermath of Restoration
C. 2 Samuel 21:1-24:25 A Finale of David Traditions
Read More About It:
Here are several good sources to aid your reading of 2 Samuel
Anderson, Bernhard W., Katheryn Pfister Darr, Understanding the Old Testament Abridged fourth Edition. (Upper Saddle River,New Jersey: Prentice Hall) 1998.
Birch, Bruce C., “The First and Second Books of Samuel, in The New Interpreter’s Bible, Volume 2 Keck, Leander E., ed. (Nashville”Abingdon Press) 1994.
Gunn, David M. “2 Samuel” in HarperCollins Bible Commentary Mays, James L. ed.(San Francisco: HarperSanFrancisco) 2000.
McKenzie, Steven L, “2 Samuel” in The New Oxford Annotated Bible with the Aporcryphal/Deuterocanonical Books, Fully Revised 4 th Edition, Michael Cougan, ed. (New York:Oxford University Press) 2010.
Stinespring, William F. and Burke O. Long “2 Samuel” in The New Oxford Annotated Bible with the Apocryphal/Deuterocanonical Books Metzger, Bruce M., Roland E. Murphy, eds.(New York: Oxford University Press) 1994.