Inept with a sword, unable to ride a horse, and apathetic toward the empire he serves, Regis Aurick is a hopeless soldier who spends his days buried in books. Banished to the borderlands, he encounters a stirring young woman with red hair and ruby eyes. She is Fourth Princess Marie Quatre Argentina de Belgaria, known simply to Regis as Altina. “…Do you want to become my tactician or not?” Having sought him for his rumored strategic prowess, she aspires to reform an empire led by self-seeking nobles and driven to pointless wars, the legendary blade of an emperor, the Grand Tonnerre Quatre, at her hip. Continuously underestimated by her regiment, including her would-be tactician, the princess resolves to prove her worth beyond a shadow of a doubt—no matter the risk. Here is a tale of war, love, and politics, woven by the bookworm and the sword princess.

Under the command of Admiral Proxy Regis, the port town of Ciennbourg is liberated from High Britannian control. But while the enemy sea routes are now successfully severed, a supply unit armed with the latest guns and cannons is already headed toward the capital. Meanwhile, Second Prince Latrielle must hold his own against the schemes of adept strategist Oswald. As the last line of defense between Verseilles and the invading forces, a tremendous weight rests on his shoulders. The enemy supply unit cannot be allowed to reach its destination, but the man guarding it is a fearless veteran known as the Mercenary King. Will the war finally come to a close, or is something even worse on the horizon? Here is the seventh volume of a tale of war, love, and politics, woven by the bookworm and the sword princess.

Fourth Princess Altina has been chased from the imperial court and assigned to command a faraway unit on the border. If she wants to one day become empress, what she needs most is wisdom. “The Eve” recounts the first time she learns about the bibliophagic tactician who goes on to become her biggest ally. A young Felicia must uphold a deception of the grandest scale, taking on a new identity to live as her late brother. Find out her fate in “Auguste, the Silver Princess.” Finally, in “A Vow to the Morning Star,” Third Prince Bastian sets off with Elize—whose right to the High Britannian throne has been stolen from her—to write a new story. Here is a set of short tales from the popular military fantasy!

“There are plenty of ways to defeat a navy that has nothing but its strength going for it...” After going up against High Britannia’s newest weapons, the Empire’s Seventh Army is helplessly defeated. While Regis’s command allows them to barely avoid complete and total annihilation, the Empire remains in a terrible predicament—the only way to stop the enemy invasion is by severing their sea routes, but the Belgarian Navy is facing great difficulties from another new innovation known as the steam ship. And so, Altina’s army heads to Port Ciennbourg to salvage the naval front. But with only sailing ships at its disposal, does Belgaria really have the means to turn the tide?! Here is the sixth volume of a tale of war, love, and politics, woven by the bookworm and the sword princess.

The mission to liberate Grebeauvoir ends in success, settling the war against the formidable High Britannian Army. Now with more achievements to his name, Regis receives another proposal from Latrielle...but the tactician promptly refuses, unable to agree with the prince’s ideals. With no other options, Latrielle gives the order: Regis d’Aurick must be assassinated. Regis plots his escape with the Renard Pendu mercenary brigade, but will our tactician manage to reunite with Altina? And how does he intend to oppose the budding new emperor?! Here is the eleventh volume of a tale of war, love, and politics, woven by the bookworm and the sword princess.

Suimei and two of his best friends find themselves mysteriously summoned to another world. There's a cute princess, magic galore, a Demon Lord that needs to be defeated, and a world that needs to be saved--the works! Too bad Suimei isn't interested. His friends are all too ready to play the parts of heroes, but Suimei just wants to get home. He has an advantage as a magician... but he's in for a rude awakening when he finds out what actually passes for magic in these parts.

“I’ll go to the capital. Even if nothing but darkness awaits me there!” Despite the odds, Princess Altina succeeds in capturing what was once considered to be an impregnable fortress. However, as the newly labeled “Marie Quatre’s Army” settles into their new base of operations, a letter arrives. It is a request from Second Prince Latrielle—an invitation for Altina to return to the capital to celebrate the day the nation was founded. The second prince is a considerable threat, especially given his complete authority over the Belgarian military, but the princess has no shortage of possible enemies. First-Grade Admin Officer Germain, First Prince Auguste, and the Vixen of the South are all in attendance, and a clash of sides seems almost certain. But have those dead set on obstructing Altina’s ambitions already made the first move...!? Here is the third volume of a tale of war, love, and politics, woven by the bookworm and the sword princess.

Suimei finally strikes out on his own, but what is life going to be like for a modern magician in an old-fashioned Adventurer's Guild? And what of Reiji, Mizuki, and Titania? How will any of them handle their first encounter with a real demon?

Following a sudden announcement, Second Prince Latrielle is set to take the throne. Altina is stricken with despair, and a summons to the capital means Regis is temporarily taken from her! But the princess’s tactician refuses to abandon her wish of doing away with the nation’s wars. Plagued with suspicions regarding the emperor’s death, he ventures to the capital alone, setting out to discern Latrielle’s true nature and intentions. Here is the eighth volume of a tale of war, love, and politics, woven by the bookworm and the sword princess.

Imperial Prince Demetrio and his advisers are stumped. And for good reason, too. Wein, the Crown Prince of Natra, has joined their meeting, and he wasn’t really invited. Wein is technically only here to return a favor to Imperial Princess Lowellmina, who can’t stand to watch her three brothers rip each other apart for the throne. Somehow or other, he finds himself teamed up with Demetrio, who seems like he’s the least likely of the three to become the next emperor...