Explanation:

- Option 1: Jeffrey Schloesser

- Jeffrey Schloesser is a retired Major General in the United States Army.

- He authored the book 'Marathon War: Leadership in Combat in Afghanistan', which discusses his experiences and leadership during his service in Afghanistan.

- Option 2: Chris Mooney

- Chris Mooney is an American journalist known for writing on science and climate change topics.

- He is not the author of 'Marathon War.'

- Option 3: Samuel Moyn

- Samuel Moyn is a historian and law professor, known for writing about human rights and European intellectual history.

- He did not author 'Marathon War.'

- Option 4: Carter Malkasian

- Carter Malkasian is an expert on counterinsurgency and has written about Afghanistan.

- However, he is not the author of 'Marathon War.'

Correct Answer: Option 1, Jeffrey Schloesser