This is a world much like our own except that vampires, witches, and more spooky boogymen-types are real. The demonic types in the RWC-verse keep it all on the down-low or behind the Dark Veil as the vampires say.
There is a Monster Mash of supernatural creatures: demons, alchemists, Rakshas, poltergeists, and more. These are modern monsters. You can find an ice-dwarf with a gym membership or an incubus on Tinder. Much like us human, they still have to answer to higher and darker authorities.
A Witch Called Red introduces you to this world and some of the major players in it.
The Blood Alliance:
Think about this as the vampire UN. After the chaos of the August Harvest when nearly a third of vampires around the world were cursed with souls, the ancient bloodlines were broken. The Blood Alliance formed in late 1940s-1950s to unify vampires, souled and unsouled.
Every two years, the Blood Alliance holds a Summit in a different city around the world. A Witch Called Red begins when the Blood Alliance comes to LA.
The Brotherhood of Bards and Heroes:
Scholars of the paranormal and mentors to the champions of humanity usually supernaturally powered young adults. They provide information to and collaborate with hunters in addition to offering bounties. They are commonly known as the Bards.
The Brotherhood of Bards and Heroes had a storied history that claimed Chiron, the mentor of Hercules and Jason, as the first Bard and that the library of Alexandria was their first and most magnificent library. It was after it burned that the Brotherhood ruled to always keep its collection divided.
Smith and Reaper:
This mysterious organization presents itself as a bank to the human world, but its Special Accounts department does more than safeguard the investments of their supernatural clientele. Centuries-old, cloaked in shadows, Smith and Reaper has offices all over the world.