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.

High Britannia and Langobarti have joined forces, and now the two nations’ troops occupy the fortified city of Grebeauvoir! At the request of Second Prince Latrielle, Regis joins the First Army in its campaign to recapture the stolen territory, devising a scheme that ultimately allows Third-Grade Combat Officer Jean Juris de Varèse to infiltrate the city. With the cooperation of a girl named Fel, it is the esteemed officer’s duty to meet the representative of the captive civilians. Will the conflict with High Britannia finally reach its conclusion? Here is the tenth 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!

The bibliophagic tactician is once again thrust into a siege! Answering a summons to the capital, he must aid Second Prince Latrielle in his pursuit of the High Britannian Army. Altina pushes onward even during Regis’s absence—having taken his words to heart, she builds up her forces as she awaits his return. Meanwhile, Third Prince Bastian has returned to Belgaria. Carrying on the will of a friend, he too is about to take a stand to change the nation. Three royals, each with their own ideals, take their first steps down the paths they believe in. Here is the ninth volume of a tale of war, love, and politics, woven by the bookworm and the sword princess.

Kaito Sena's life hasn't exactly been easy. Unfortunately for him, death isn't about to get any better. Summoned by none other than Elisabeth Le Fanu, the "Torture Princess," Kaito has to choose what he wants for his second life-be her butler, or die a long, painful death by torture. What is he to do but become her servant...and help her eliminate the fourteen ranked demons wreaking havoc in the world! See the original light novel come to life in this gritty manga adaptation!

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.