Title: The Fighting Ground
Content:  The Fighting Ground is a 1984 historical young-adult novel written by Edward Irving Wortis, under his pen name, Avi. The book is about the disillusioning experience of a young teenager who runs away to fight in the American Revolutionary War. The novel covers two days, 3 to 4 April 1778.
Title: Ground warfare
Content: Christopher Tuck. Understanding Land Warfare. London–NY: Routledge, 2014. 
Title: Battle Ground (The Dresden Files)
Content:  Battle Ground is a novel by Jim Butcher and is the 17th novel in The Dresden Files. Battle Ground was published on September 29th, 2020 by Little, Brown Book Group. In it Harry Dresden, the protagonist, attempts to stop the Titan Ethniu from destroying Chicago. It will be followed by an 18th and 19th novel: Twelve Months and Mirror Mirror.
Title: In Death Ground
Content:  In Death Ground is a 1997 military science fiction novel by American writer David Weber and Steve White. The story is completed in the novel The Shiva Option. The title is taken from a passage in Chapter 11 of Sun Tzu's The Art of War: "In difficult ground, press on; On hemmed-in ground, use subterfuge; In death ground, fight." The original text is ”圮地則行；圍地則謀；死地則戰“.
Title: War from the Ground Up
Content:  War from the Ground Up received generally positive reviews. Military historian Michael Howard compared the work to The Face of Battle by John Keegan and even On War by Carl von Clausewitz, saying that it "should be compulsory reading at every level in the military." Journalist Thomas Ricks reviewed the book as well, praising its writing style and its exploration of strategic narrative. Paul Raymond Newton, writing for the RUSI Journal, described the book as "impressive" but noted that it incorporated some strawman arguments, while in Parameters Richard Swain found the work to contain a "great wealth of thought" but also some structural deficiencies. Writing on the book in Foreign Affairs, Lawrence Freedman called it "an erudite and intelligent contribution to the literature on counterinsurgency."
Title: The Field of Fight
Content:  Flynn co-wrote with Republican presidential candidate Carly Fiorina. St Martin's Press announced in December 2015 that it would be publishing the book the following July. In a press release, Flynn said: "I am writing this book for two reasons: first, to show that the war is being waged against us by enemies this administration has forbidden us to describe: radical Islamists. Second, to lay out a winning strategy that is not passively relying on technology and drone attacks to do the job. We could lose this war; in fact, right now we are losing. The Field of Fight will give my view on how to win." After its publication on July 1, 2016, The Field of Fight briefly entered the Publishers Weekly bestseller list for the week ending July 17. It reached #9 in the chart but fell out of the top 10 the following week.
Title: Boots on the Ground
Content:  Boots on the Ground: A Month with the 82nd Airborne in the Battle for Iraq is a book written by journalist Karl Zinsmeister, who was embedded with the storied 82nd Airborne Division during the early days of Operation Iraqi Freedom.
Title: War from the Ground Up
Content:  War from the Ground Up: Twenty-First Century Combat as Politics is a 2012 book on war and military strategy written by Emile Simpson, a former British Army officer. The book analyzes the War in Afghanistan (2001–present) in terms of Carl von Clausewitz's theory of war, arguing that modern counter-insurgencies have more in common with domestic political struggles than the traditional state-on-state conflicts described by Clausewitz. The book was favorably reviewed by Michael Howard, a prominent military historian, among others.
Title: List of authors in war
Content: Robert Lawrence, (When The Fighting Is Over) 
Title: Boots on the Ground
Content:  Boots on the Ground... is an account of the war in Iraq with the 2nd Brigade of the 82nd Airborne as it convoys north from Kuwait to Iraq's Tallil Air Base en route to night-and-day battles within the major city of Samawah and its bridges across the Euphrates. Zinsmeister, a frontline reporter embedded with the 82nd Airborne, seeks to convey the detailed planning and technical execution that make up today's warfare. The book brings to life local firefights and the constant air-ground interactions that are one of the key innovations of modern precision combat.

Question: Who is the author of The Fighting Ground?
Answer: Avi.
Edward Irving Wortis.