If You Like Tom Clancy...

Warrior Class  by Dale Brown
Young Air Force General and former hot-shot pilot Patrick McLanahan puts himself in direct opposition with the newly elected isolationist President Thorne when he tries to stop the plans of a ruthless Russian oilman from creating an oil monopoly. Also try Brown’s other novels featuring McLanahan, including The Tin Man and 2007’s Strike Force.

Seas of Crisis  by Joe Buff
It's 2012, and America is at war with the neo-Axis coalition of Germany and South Africa. Britain is blockaded, and only America remains to fight on and in the last battlefield, the oceans of the world. Cmdr. Jeffery Fuller captains the USS Challenger, the most powerful nuclear-powered fast-attack submarine in America's arsenal. Fuller, a Medal of Honor winner, has fought many battles and now must implement one of the greatest wartime ruses ever attempted.  Deep Sound Channel is the first in the Jeffrey Fuller series.

Flight of the Intruder  by Stephen Coonts
This first novel by an ex-Naval aviator features Lt. Jake "Cool Hand" Grafton and his fellow pilots, who are stationed on the aircraft carrier Shiloh off the South Vietnamese coast in 1973. Grafton's anger at the rarely seen enemy and bitterness toward the "precious asses" in  Washington grow until they explode in a daring and unauthorized raid on the National Assembly Building in Hanoi. The Jake Grafton novels continue with Final Flight.

Transfer of Power  by Vince Flynn 
In a night of shattering brutality, three of Washington's most powerful and unscrupulous politicians have been executed with surgical precision. When the assassins warn that no one is out of their reach – not even the President, it is up to the CIA's top counter-terrorism specialist, Mitch Rapp, to stop the insurrection. The latest Mitch Rapp novel is Protect and Defend.

The Lieutenants  by W.E.B. Griffin
Griffin writes five different series, four of which involve the U.S. military. In this first adventure in the Brotherhood of War series, Lieutenant Robert Bellmon becomes a German prisoner in World War II, and a sympathetic German officer shows him photographic evidence of the Soviet massacre of Poles before helping him escape. The next in this series is The Captains.

The Eye of the Storm  by Jack Higgins
Elusive master terrorist Sean Dillon reemerges during the Gulf War when Saddam Hussein hires him to assassinate Margaret Thatcher, and only Martin Brosnan can stop him. The most recent in the Sean Dillon thriller series is Killing Ground. 

Sphere of Influence by Kyle Mills
When evidence emerges of a terrorist cell in the United States that has access to modern missile technology, FBI agent Mark Beamon goes undercover and stumbles upon an international criminal conspiracy with ties to the government. The Mark Beamon series begins with Rising Phoenix.

Firewall  by R.J. Pineiro
After the death of his employer, artificial intelligence tycoon Mortimer Fox, ex-CIA agent Bruce Tucker races to find Fox's daughter Monica, who is in possession of a top-secret, time-sensitive code capable of launching the world's nuclear missiles. While not strictly military, the ex-CIA agent and computer technology do make this novel a good bet for Clancy fans. Also try Cyberterror.

The Passage  by David Poyer
Dan Lenson boards a new Spruance-class destroyer in the wake of the breakup of his marriage. As if this were not heavy enough baggage, he quickly encounters a sailor's suicide, a gay commanding officer, sabotage of the computer systems, being cast adrift with a pregnant Cuban woman, a rescue by a Russian destroyer, a riot in Miami and – climactically – mutiny, murder and confrontation with the same Russian destroyer. 2007’s Korea Strait is the most recent Dan Lenson adventure.

Nimitz Class  by Patrick Robinson
The Nimitz Class nuclear aircraft carrier USS Thomas Jefferson is secretly attacked and destroyed. At first, the loss is deemed an accident, but Lt. Commander Bill Baldridge convinces the President that the ship was attacked. The investigation takes him from Britain's top-flight submarine school to the depths of the Bosporus in pursuit of a rogue Iraqi sub captain and his commandeered Russian submarine. The Navy series continues with Kilo Class.

Assured Response  by Joe Weber
Confronted by a new generation of deadly terrorists who will stop at nothing in their fanatical quest to annihilate the United States, President Cord Macklin sends two top-secret operatives armed with the latest technological gadgetry, former military pilots Scott Dalton and Jackie Sullivan, on a mission to stop a nuclear holocaust that will reach from the Canadian border to the centers of American power.  Also try Targets of Opportunity.