Of Bravery and Bluster (Book 2 - Worlds Afire) by Scott Kelemen

Book 2 of Worlds Afire After years of intense training in the star system of Havoc, five cadets are nearing graduation from the Academy which trains officers for the Alliance Navy, the force responsible for protecting humanity in a region of space far from Earth. Having survived every test the Academy has to offer, including a deadly encounter with rogue cadets that was never planned, the cadets must now embark on a new series of challenges that will have them face to face with aliens, meet high powered politicians, and tested for bravery under deadly stress. Yet as difficult as those trials might be, there are worse dangers stalking them in the dark. The agents who manipulated the rogue cadets seek a reckoning for their disrupted plans, and an old enemy is about to resurface who is not nearly as dead as everyone thinks. The Academy wants to test the mettle of these cadets. But what they are about to experience will go far beyond anything their instructors ever intended.

Protostar: An Automatic Apocalypse by Jesse Pohlman

Lahira Ocean is the Captain of the Messenger, a cutting-edge Cruiser defending Humanity and its allies against an alien race called The Orphans. After a hectic battle at the planet Gagarin, Lahira awakens from a two-week long coma to find two strangers carefully awaiting her recovery. The first is clearly from the upper echelons of Earth's government who calls himself Herodotus Fork; the second is distantly familiar to Lahira as a woman named Amber, an ambassador from the Automatons, a 'species' of alien who are fully artificial intelligences. Neither are happy to be sitting over her hospital bed. Lahira is suspected of being involved in an unprecedented attack on an Automaton: During the Battle of Gagarin, Lahira's ship emitted a strange signal which seemed to corrupt the mind of an elder Automaton, and Amber has been assigned to levy judgment about what happened. Unfortunately for her, the chaos of the ensuing melee led to the Human receiving serious injuries: She was mentally connected to a computer system which shorted out. These injuries - along with others lurking deeper under the surface of her thoughts - have induced retrograde amnesia, meaning she cannot fully explain the events leading to her role in the brawl.

Of Daring and Devilry (Book 4 - Worlds Afire) by Scott Kelemen

Book 4 of the Worlds Afire Series: For those who survived the conflict at New Liberty, the galaxy has been forever changed. Nothing had prepared them for the realities of open conflict, and most found themselves unready. Even those who displayed courage cannot ignore that the battle unveiled how centuries of peace have eroded the Navy's fighting edge. Johanna Summer and her friends try to put the pain they suffered behind them and look toward the future. Their careers are still new, and they still have much to prove. But sweeping change is not kind. It does not wait for people to be ready. Events have been put into motion that cannot be stopped. War is coming. Once again, all these young officers can do is try and survive lest they be pulled under by the violent currents swirling around them.

Of Courage and Chaos (Book 3 - Worlds Afire) by Scott Kelemen

Book 3 of the "Worlds Afire" Series Having survived the final trials of the Academy, Johanna and her friends begin their careers amidst the stars as Midshipmen in the Alliance Navy fleet. As they take their first steps, hidden forces continue their work to de-stabilize the very Alliance so many have fought to protect. Their plans will empower a madman, whose murderous attempt to usurp power will incite war for the first time in centuries. The Alliance Navy is summoned to stop him, and those ships will carry Johanna and the others right into the heart of the storm.

Thicker Than Blood (The Journey Missions Book 3) by Holly Ash

Lieutenant Commander Crystal Wolf's hatred of politics has never been a secret through her spotless military career. So why is she being sent to Earth to speak at a military hearing on behalf of The Lands and Waters of Neophia Organization? When Crystal's team is tasked with convincing the US military to continue the officer exchange program that first brought Lieutenant Desiree Flint and Ensign Justin Anderson to Neophia to serve on Journey’s first tour, the stakes are already high: if they fail their mission, Flint and Anderson won’t be able to return for the second tour. And to make matters worse, they arrive on Earth to find relations between the two planets are far worse than anyone let on. Things escalate when a terrorist group attacks a string of hospitals, demanding the US government acknowledge Neophia’s superiority. Divided from their team in the wake of a retaliatory order that detains anyone with Neophian blood, Flint and Anderson, the only two pure humans, must find a way to complete their mission--and get the rest of their team home in one piece.

IRONSHIELD (The Ironshield Saga, #1) by Edward Nile

A Pile of Scrap, Held Together by an Ideal. It's been almost thirty years since the budding nation of Arkenia used Kaizer Warsuits, gas-powered mechanical giants, to wrestle independence from a tyrannical empire. Now, Arkenia is pressured into disarmament by that same power, strong-armed into a deal that will strip them of the very weapons that won their sovereignty. The Southern provinces agree to the terms. The Northern Industrialists do not. Led by commander James Edstein, heir to the legacy of the mighty Ironshield Warsuit, the North defies the Southern Appeasers. Intent on keeping their Warsuits, and their nation’s hard-fought independence, from Imperial rule. Senator Samuel Mutton, veteran of the Revolution and a key leader in the South, wants nothing but peace for his nation. No matter how high the cost. As the Civil War ramps up, both men are forced to question their morals, forced to decide what matters most. Victory, or Honor.

Family Binds (The Journey Missions Book 2) by Holly Ash

It should have been a routine rescue mission Lieutenant Commander Crystal Wolf could lead in her sleep: go in, restore life support, and evacuate the colonists of Stapleton Farms if things went south. But when the true identity of Stapleton Farms’ leader is revealed, it changes everything. And for the first time in her career, Crystal is emotionally compromised. With the Commander gone, Lieutenant Desiree Flint must put her own prejudices aside and lead an investigation into the sabotage against Stapleton Farms’ computers; but she soon realizes there’s more at stake here than one colony or Neophia's food supply. War is in the air, even if no one else can see it yet. And Desi can’t stop it on her own. In over her head, Desi only has one person she can turn to for help. But can Crystal set aside the betrayal, pain, and chaos of a compromised past in time to stop Stapleton Farms from being destroyed – and prevent war?

Crystal and Flint (The Journey Missions Book 1) by Holly Ash

It’s been 300 years since humans arrived on Neophia and the planet’s intelligent species have yet to agree on how much influence humans and their advanced technology should have on the planet. With the threat of war hanging in the air, Lieutenant Commander Crystal Wolf races to finish construction of the mega submarine, Journey, in order to calm political tensions on Neophia and cement her already stellar military career.Lieutenant Desiree Flint never dreamed she would leave Earth to serve on Neophia, but with the end of her military career in sight she doesn’t see a way around it. Determined to rebuild her reputation on Neophia, no matter the cost, she sets her sights on dethroning Commander Wolf in order to prove her own superiority. When Journey is attacked by someone from Crystal’s past, the two women must find a way to work together to save the ship, liberate an underwater colony from an oppressive government, and prevent a war.