The Talen Series are books that share a connected world, with passing characters and storylines. Each book Can be read as a standalone but the experience is enhanced when reading them together. There are three recommended orders to reading the Talen Series. Note: The Talen Series is still expanding so this may change in the future.

If you have never read my books before, My Dragon System is the first in the series, there is also a webtoon of this series on Webnovel. Next, My Vampire System and Lastly My Werewolf System. 

However, Most people start with My Vampire System as it's the most popular, I would then recommend reading it in the following. 
My Vampire, My Dragon, My Werewolf System.

If readers wish to read in a chronological timeline then the story is as follows. 
My Dragon System, My Werewolf System, My Vampire System