Closing In: Marines in the Seizure of Iwo Jima is a fact-based account of the battle for Iwo Jima in the Pacific, a major battle in which the United States Marine Corps and the United States Navy landed on and eventually captured the island of Iwo Jima from the Imperial Japanese Army during World War II. The war took place on Iwo Jima volcano island, which was a small island for such a large number of casualties of about twenty-two thousand Japanese and nearly seven thousand US Marines, with another nineteen thousand Americans injured.

Joseph H. Alexander (1938 – 2014) himself was a Colonel of the United States Marine Corps, where he served for twenty-nine years, and he was also a historian. He has given a historical insight into the war in the Pacific through this book.