Sword Art Online Books in Order

Kirito logs into Sword Art Online and discovers that players cannot leave until they conquer its hundred floors. With virtual deaths becoming real ones, he must survive a game whose creator has turned immersive entertainment into a deadly prison.

Four stories explore Kirito's encounters with Silica the beast tamer, Lisbeth the blacksmith, the mysterious orphan Yui, and Sachi. Trapped in Aincrad, these players seek friendship and ordinary happiness while living under the threat of permanent death.

Brought back to reality after escaping Sword Art Online, Kirito finds that Asuna has not awakened. A picture of a captive girl draws him into ALfheim Online, a fairy game where flight offers new possibilities for rescuing her.

Kirito approaches ALfheim Online's World Tree, where Asuna remains imprisoned, with help from Leafa and Yui. Enemy salamanders complicate the rescue, while secrets between Kirito and Leafa threaten their partnership just as their destination comes within reach.

Kirito enters Gun Gale Online to investigate Death Gun, an apparent connection between virtual attacks and real deaths. Guided by the sniper Sinon, he joins the Bullet of Bullets tournament and adapts his swordsmanship to a world dominated by firearms.

Kirito and Sinon reach the Bullet of Bullets finals while investigating Death Gun's real-world killings. As Sinon's past becomes impossible to avoid, Kirito searches for connections to Sword Art Online before the mysterious attacker claims another victim.

Three stories revisit Kirito's experiences across virtual worlds: a killing inside Aincrad's supposedly safe zone, the quest for Excalibur in ALfheim Online, and his earliest survival efforts as a trapped player relying on knowledge from the beta test.

An unfamiliar ALfheim Online duelist defeats every challenger, including Kirito, using a distinctive sword skill. When Asuna tests this formidable opponent herself, she receives an unexpected guild invitation and must discover what its members hope to achieve.

Kirito awakens in an unfamiliar forest and meets a boy whose emotions seem far too human for an ordinary NPC. Their search for answers stirs memories of a shared childhood and a golden-haired girl named Alice.

Kirito and Eugeo enter the Imperial Swordcraft Academy, hoping to earn the rank needed to reach the Integrity Knights and find Alice. Outside their mysterious world, Asuna searches for Kirito and the truth behind his disappearance.

Now elite Swordcraft Academy disciples, Kirito and Eugeo prepare for a tournament while mentoring younger students. Their pursuit of Alice runs into the Taboo Index, forcing them to confront the conflict between obeying the law and protecting others.

Separated near the top of Central Cathedral, Kirito climbs its exterior with Alice while Eugeo confronts commander Bercouli. Their different routes test unlikely alliances and swordsmanship as they push toward the final stages of their journey.

Kirito and Eugeo resume climbing Central Cathedral, where powerful Integrity Knights block their route to Alice. Armed with knowledge of the Underworld's dark history, Kirito faces increasingly difficult choices as the true stakes of their mission become clear.

Kirito remains incapacitated months after the struggle against Administrator, and Alice must adjust to life while caring for him. As armies gather in the Dark Territory, she and Bercouli face preparations for the approaching Final Stress Test.

Kirito and Alice approach Administrator at the top of Central Cathedral, only to encounter Eugeo as an Integrity Knight. Kirito must reach his friend's buried self while facing an opponent whose transformed identity threatens their shared mission.

Gabriel Miller leads the Dark Territory's massive army as Emperor Vecta against Bercouli's outnumbered defenders. With Kirito unable to fight, his allies struggle to protect him while enemy magic threatens the battlefield and Asuna approaches the conflict.

A deceptive invitation brings thousands of new combatants into the Underworld, reinforcing the Dark Army during the final stress test. Asuna struggles against the growing assault as Sinon and Leafa enter with powerful accounts to support her.

Asuna, Lisbeth, and Silica fight to hold back the Dark Army during the Underworld’s final stress test. Kirito falls into PoH’s hands, leaving his friends struggling against an enemy driven by years of hatred and revenge.

Peace brings cultural exchange between the Underworld’s human and dark realms, but not everyone welcomes reconciliation. Apprentice knight Ronie Arabel faces Kirito’s warning of renewed war as hidden opponents seek to undermine the fragile new order.

Kirito’s pursuit of a kidnapper leads Asuna to investigate the past through her scrying art. Before they can act on what she discovers, Ronie and Tiese are captured, forcing a young dragon into a dangerous rescue.

Four side stories follow Kirito and his companions beyond their main adventures. In-game marriage, Asuna’s adjustment to a new avatar, an undersea mystery, and two sisters’ experiences with virtual reality explore challenges within their expanding digital lives.

Kirito, Asuna, and Alice are unexpectedly transported into Unital Ring, a survival game combining worlds created through the Seed. Stripped of familiar resources, they must learn new rules and build a way to survive its unfamiliar wilderness.

Sinon enters Unital Ring without allies or equipment and faces dwindling resources and a dangerous boss. Kirito’s group divides between finding her and protecting their home, unaware that another enemy is preparing to strike at them.

An enemy targeting Kirito’s party emerges in Unital Ring while a reunion with Kikuoka opens a route back to the Underworld. Two centuries of change and a strangely familiar Integrity Knight leader confront Kirito, Asuna, and Alice.

Kirito encounters Eolyne, whose resemblance to a lost friend unsettles him as war threatens the Underworld. Meanwhile, Mutasina commands a hundred mages in Unital Ring, forcing Kirito’s allies to prepare for a battle against overwhelming numbers.