I received my PDF for the new Pathfinder 2e Book of the Dead, so I thought I'd share some quick stuff, starting out with character facing options.
First off is the skeleton ancestry. This ancestry grants a boost to Dex, Cha, and a free choice, but has a flaw to Int. Its heritage options include fodder skeletons (from standard humanoids, making them slightly faster), compact skeletons (who are smaller and able to fit in tight spaces), sturdy skeletons (who have more Hit Points and are more difficult to kill), and monstrous skeletons (gaining a natural attack). Their ancestry feats allow them to play dead, recall memories of their past life, detach arms to extend their reach, and fire shards of bones. Further down the line, they can rearrange their bones to resemble animals, command other undead, transform into a swirling storm of bones, and cast harm as an innate spell once per hour.
There are a number of undead archetypes, which grant a handful of basic abilities to start with that can advance with further investment in the archetypes while also having unique powers.
First on the list of undead archetypes is the Ghost Dedication. A spirit of mist and anguish, ghosts float over the ground, can transmute material items into an incorporeal form you can wield, and the ability to harm other incorporeal creatures without issue. They can release ghostly moans, gain a resistance to all types of damage (except force, positive, and ghost touch weapons), fly through the air, and pass through physical barriers.
Next is the Ghoul Dedication, which can only be taken by a character who has died from ghoul fever. They return with a pair of claws and a jaw attack as well as the ability to strip away the flesh of recently dead creatures to feed. At later levels, eating freshly dead flesh can heal them. They become faster and can make a strike that halves the healing a foe receives as well as eventually being able to paralyze and sicken creatures struck by their natural attacks.
A late level undead archetype, the lich archetype can only be taken by spellcasters, which grants them a soul cage to hose their soul when their body is destroyed. Liches born from wizards can drain their soul cages to cast any spell they’ve learned. Further down the line, liches gain a fist strike that deals negative damage and can slow foes struck by it, embed gems in their skull to gain certain spells, and develop a frightful aura.
The Mummy Dedication makes the character somewhat hardier than typical undead and equipped with a fist that deals greater damage, but they also have a weakness to fire. They can project an aura of despair that frightens foes, a curse they can deliver on a strike, wrappings that can ensnare foes, and the ability to drain moisture from creatures in a cone. They are also linked to their environment, being able to move through it easier shroud themselves in it, and even take on the form of it.
For those slain by a vampire drinking their blood, they can take the Vampire Dedication, gaining a fangs unarmed attack with the grapple trait and the ability to drain blood of a grabbed creature to gain temp HP. Vampires are capable climbers, can gain charm as an innate spell, communicate with bats, rats, and wolves, or even gain the ability to walk in sunlight without being destroyed. Vicious Fangs allows your fangs to cause bleed damage on a crit while further feats down the line allow you to transform into giant bats or mist to escape your foes.
Finally, there's the Zombie Dedication. Those who have been brought back as zombies gain a jaw attack they can use against grappled foes. They are talented at fighting from the ground, feast upon creatures to gain temp HP, eat brains to gain a bonus on Recall Knowledge checks, control detached limbs, and become very difficult to slay.
Undead companions include creature the fill the same role as animal companions as well as familiars. Among the former, there are ghosts with telekinetic powers, skeletal mounts that can transport you swiftly across the battlefield, skeletal servants that can launch their heads at people, vampiric animals that feast on bleeding foes, and zombies that project auras of rot that cause wounds to fester. There are also undead familiars such as crawling hands, old friends such as departed pets, prolongs made from the blood of murder victims, or a talking head.
Summoners might make use of undead eidolons, gaining access to divine magic and starting off with abilities that grant it the resistances of undead. At later levels, the undead eidolon can drain the life of its foes or draw you back from the brink of death.
Undead companions are most frequently controlled by undead masters, an archetype commands undead companions just as beastmasters command animals. They're unique feats allow them to use undead companions as a shield and summon them from the grave to provide their support.
The Reanimator Dedication is for spellcasters who want to control and command a great band of undead. The reanimator can create stronger undead than usual as well as summon more at once, potentially flooding the field with undead minions.
The book also contains several anti-undead archetypes, my favorite of which is the Exorcist Dedication given its neat abilities. The exorcist collects spirit wisps in an item known as a spirit dwelling, which can help these spirits let go of their resentments and move on to the afterlife. You can also use the emotional energy of these spirits for several effects, the first of which is to protect you against other spirits. Other spendings of spirits can heal you or allies or deal sonic damage in an area.
If you've ever read the Abhorsen Trilogy (I don't remember the names of the individual books), then you know what the Hallowed Necromancer Dedication is all about. The hallowed necromancer uses necromantic magic to put undead to rest, starting with a spell that damages undead and weakens them to your further necromancy spells. It gains additional spells that it converts into necromancy spells as well as some appropriate domain spells. Its final feat grants you can aura that causes undead who enter it to become frightened.
For those who want to channel the power of the psychopomps, there is the Soul Warden Dedication. They view themselves as an honorary psychopomp, ushering spirits into the afterlife. They can emblazon their armaments with sigils that detect undead, gain anti-undead spells, a psychopomp familiar, and the ability to empower you and your allies’ attacks against undead.
My second favorite of the anti-undead archetypes is the Undead Slayer Dedication. It's less magic based than some of them and has a very Belmont-feel to it with its feats. The undead slayer targets specific type of undead, learning about them and being able to more readily identify them. They become more resistant to the powers of undead and better at evading them while also gaining combat capabilities to more swiftly slay them. Their study of undead means they often have equipment to specifically counter them, which they can produce on the fly.
There's also a horde of items, both mundane and magical, that many of them just didn't even have pictures of, so I neglected to include them. If you have any questions about stuff in the book, I'll try my best to answer them! I am probably gonna make a separate post with the GM-facing options.