From the How to Use This Guide section:
Welcome to Geb, land of the dead!
If you’re reading this Player’s Guide, it means you and your friends have decided you might like to play the Blood Lords Adventure Path. In this campaign for Pathfinder Second Edition, you’ll create a 1st‑level character and take on the role of an aspiring troubleshooter in a nation run by both ageless undead and the cunning living people who rub shoulders with them. This nation is ruled by a ghost king named Geb(who, in a characteristic display of hubris, named his nation after himself), but the real work of running the nation is done by a fractious council of about 60 people called the Blood Lords. The Blood Lords are predominantly (but not exclusively) undead and are predominantly (but not exclusively) necromancers. Some of them have ruled Geb for thousands of years. Anyone can join this council if they have enough skill, tenacity, and luck—and your characters are destined to join them, scheming your way to the top! You’ll need to vanquish foes, curry favor, and occasionally betray some of your NPC allies to succeed in Geb. If you die trying, well, the undead rule in Geb just as much as the living!