I always think the Library is a source of first resort.
Ah, the joys of the term "modern" - here are a few by one author:
http://www.amazon.com/Tank-Aces-Ralph-Zumbro/dp/0671536125/ref=pd_sim_b_3/184-1978932-4189247A collection of firsthand accounts from combat tanker soldiers who served in wars during the twentieth century covers a range of historical moments surrounding such figures as Patton and Saddam Hussein
http://www.amazon.com/Tank-Sergeant-Ralph-Zumbro/dp/0671639455From tearing roads through the jungle to blasting out Viet Cong positions, from convoy escort to rescue operations, the tank crews in Vietnam did it all. Here is the best account ever of this fascinating aspect of the Vietnam War: Sgt. Ralph "Zippo" Zumbro's evocative, action-packed memoir of a year with A Company, 1st Battalion, 69th Armor.
Always bold, sometimes reckless, the "tread heads" who manned "The Ape," "Assassin," and "The A-Go-Go" devised new combat tactics -- often in the heat of battle. Cut off from supply lines, they became master jury riggers and scroungers. They shared a unique perspective of Vietnam: from smiling Coca-Cola girls who betrayed you to Charlie, to buddies who stayed above the hatch a moment too long -- and took an anti-tank rocket in the chest; from impromptu fish fries to the Tet Offensive. When Sgt. Zumbro's tour of duty ended in June 1968, A Company was the most highly decorated unit in Vietnam.
http://www.amazon.com/The-Iron-Cavalry-Ralph-Zumbro/dp/0671013904/ref=pd_sim_b_1/184-1978932-4189247Placing the reader inside yesterday's mechanical beasts as well as today's sophisticated, night-seeing machines, this book shows how armies throughout the world have utilized tanks, retaliated against them, and why the next land war will be more mobile, more armored, and more deadly than ever before
and some others:
http://www.amazon.com/War-Stories-Tankers-American-Armored/dp/0760332975/ref=pd_sim_b_2/184-1978932-4189247These are the war stories few can tell, the harrowing firsthand accounts of armored combat, from the days of the centurys first tanks to the latest encounter on the streets of Baghdad. Here are the still-vivid impressions of the brave young men who fought in the mud and trenches of no-mans land during World War I.
http://www.amazon.com/Praying-Slack-Marine-Corps-Commander/dp/0760320500/ref=pd_sim_b_5Two different wars were fought in Vietnam, the jungle-and-booby-trap one down south, and the WWII-like one up on the DMZ. "I was one of a handful whose Vietnam tour was evenly split between the First and Third Marine Divisions, and saw, firsthand, the difference 170 miles could make during the war's bloodiest year." Corporal Robert Peavey was a tank commander in I Corps (Eye Corps) on the DMZ when LBJ ordered a bombing halt over the North. His compelling first-hand account chronicles operations just south of the 'Z, operations that most Vietnam War histories have completely ignored. Peavey offers detailed, understandable explanations of combat strategy, strengths and shortcomings of standard-issue armament, and inter-service rivalries.
http://www.amazon.com/Blackhorse-Riders-Desperate-Extraordinary-Mission/dp/B00BDHX862/ref=pd_sim_b_3Winner of the 2012 USA Best Book Award for Military History
Philip Keith's Blackhorse Riders is the incredible true story of a brave military unit in Vietnam that risked everything to rescue an outnumbered troop under heavy fire—and the thirty-nine-year odyssey to recognize their bravery.
Gracias,
Glenn