The world building for the Black Blood Series is somehow different to the usual or textbook-style werewolf stories. This allows the author to play around more about werewolf-themed plots for the series. Here is some of the following key information to help the readers familiarize themselves with the Black Blood world:
1. Werewolves normally first experience shape-shifting the same year they celebrate their fifth birthday. This happens any month of the year, during the full moon. They will also experience symptoms, such as body ache, fatigue, shivers, fever, and headache, to prepare and condition their body.
2. Instead of eighteen, werewolves will only find their mate once they turn twenty-one years old.
3. Werewolves cannot reject their destined mate, which is the most important rule.
4. Werewolves are only allowed to shape-shift within their own private land and territory. In order to avoid chaos and feuds with humans, it is forbidden to change their appearance — accidentally or not — in public.
*Note that if a werewolf experiences overwhelming emotions that are out of control, their irises will change to the same color in werewolf form. They are also at risk of involuntary shape-shifting.
5. A werewolf pack changes the alpha every generation. An alpha will serve the pack as its chief for twenty years or more. For the sake of fairness, anyone in the pack who is up for the fight, can take the challenge and try to claim the highest position.
6. If a werewolf has a human mate, it is possible not to conceive a werewolf child.
7. The setting of the story is semi-fictional, insinuating that this story is happening in another dimension. The author used places in the real world with minimal but notable distinctions.