Karthador is a science-fantasy world in the tradition of Flash Gordon’s Mongo and John Carter’s Barsoom. It’s a vibrant setting full of swashbuckling heroes, terrible monsters, and insidious inhuman creatures lurking in the shadows. Adventure is everywhere in Karthador. In the steaming jungles, frogmen ride dinosaurs and plot their reptilian revenge. In the gleaming towers of the endless city, technocrats duel with energy pistols and dream of an empire reborn. Aboard the aerial merchant ships, crewmen bring cannons to bear against air pirates and fearsome flying beasts. Karthador is a land of beauty and danger, where the stakes are high and the risks higher.

Deep beneath the orc city of Urgir in the Hold of Belkzen lie the ruins of the ancient dwarven Sky Citadel of Koldukar, where awaits what could be the greatest discovery of the Age of Lost Omens: confirmation of the location of one of the lost Sky Citadels, built by the dwarves in their earliest days on the surface of Golarion. But reaching their destination won't be easy for the Pathfinders, and only the most skilled will survive Urgir and the terrors guarding the dwarves' long-abandoned secrets. Can they uncover the location of the lost Sky Citadel, or will the Pathfinders suffer the same fate as Koldukar—defeat at the hands of ruthless orcs and centuries of decay under the earth?

After a year of searching and risking life and limb, the agents of the Pathfinder Society have discovered the resting place of the Runelord of Sloth, who has been sequestered from the world at large for 10,000 years awaiting the proper time for his return. Thanks to the efforts of the sinister cult of Lissala, that time is now. In a desperate attempt to defeat this ancient evil once and for all, the Decemvirate sends its best agents, armed with relics found throughout ancient Thassilon, to foil the cult's last-ditch efforts to usher in a new era of tyranny and strife. Will the party succeed in preventing Krune's return to Golarion, or will the Pathfinder Society serve simply as a speed-bump in the runelord's path to domination over the entire region?

After a recent discovery of a lost city in the heart of the demon-infested Worldwound, Pathfinder agents from around the world flock to Nerosyan, capital of the crusader nation of Mendev, to prepare for the coming adventure. When the city falls under attack, however, everyone within its walls must take up arms to defend against the Abyssal hordes. Do the Pathfinders have what it takes to hold back the demonic onslaught, or will their souls be among the first to be consumed when the Diamond of the North falls?

On the eastern continent of Tian Xia, the Pathfinder Society remains a small player in the greater political landscape, but Amara Li, head of the Lantern Lodge in the teeming city of Goka, has plans to change that. In order to secure the Pathfinder Society's place as an influential organization on the far side of the world from the Grand Lodge in Absalom, she must orchestrate an alliance with the mysterious Way of the Kirin. But the longtime rival of the Pathfinder Society, the Aspis Consortium, has plans to form an alliance of its own, and if the consortium succeeds, the Pathfinder Society's hopes of cementing their place in the Dragon Empires could be dashed forever.

The dwarven sky citadel of Janderhoff in eastern Varisia is one of the least visited settlements in the land, at least by non-dwarves. Nevertheless, the Pathfinder Society has been invited to assist in the excavation of a forgotten ruin within the large underground complex. What the fearless adventurers stand to find within could be the greatest discovery of the Age of Lost Omens, something sure to immortalize all involved in the pages of the Pathfinder Chronicles for ever more. But the ruins under Janderhoff aren't the end of the Pathfinders' journey; rather they illuminate a treacherous path ahead, from the familiar land of Varisia into much more dangerous territory.

The Pathfinder Society's conflict with the Aspis Consortium in the frontier region of Varisia has come to a head, and the time to secure dominance of the ancient land is now. But despite mounting victories on the Society's part, the Aspis Consortium still has a few tricks up its sleeves, including several powerful agents from the Pathfinders' past who could prove too challenging an obstacle to surmount. Can the PCs end the ongoing struggle for control of the flow of ancient Thassilonian artifacts out of Varisia's ports, or will the Aspis Consortium succeed in keeping the Pathfinder Society ever in its shadow as it profits on the exploitation of the millennia?

The Pathfinder Society has discovered the hint of a monumental revelation, but in order to confirm their find, they must send a team of agents into the dangerous and unwelcoming orc-ruled Hold of Belkzen. While an expedition could easily be dispatched to the orc capital of Urgir, the Decemvirate urges caution to ensure success. Thus, a team of Pathfinders must seek out a guide in the Varisian orc city of Urglin. Can they navigate the treacherous city of denizens who wouldn't mind seeing them dead, or will the orcs' Second Home be the site of their final mission?

Hermetic magi grow powerful in their age. They can defeat mundane armies single-handed, challenge spirits of fire in their lair, and drive the servants of Hell from their strongholds. No place in Mythic Europe is too distant, and no barrier can keep them out. From the popes and kings who rule to the peasants who till the soil, none may deny a magus for long. Why, then, would magi stay closeted in their laboratories? With great power comes great stories.

For the past year, the Pathfinder Society has used the isolated demiplane contained in the Hao Jin Tapestry as a private adventuring realm and, since discovering a backdoor out of the demiplane, as a shortcut from the tapestry's location to a hidden corner of Varisia. But the tapestry wasn't designed for this purpose, and travel from Absalom to Varisia could be more efficient. Now a team of Pathfinders must discover how the infamous sorcerer known as the Ruby Phoenix created her private demiplane and enter the heart of the tapestry and alter the very nature of the magical realm.