The Caster Chronicles is a young adult urban fantasy series by author Kami Garcia. The first book in the series, Beautiful Creatures, was published in 2009.
Garcia has said that the idea for the series came to her while she was working on another project. She was struggling to come up with an idea for a new story, when she suddenly thought of a girl who could turn into a bird. She began developing the character and the world she lived in, and eventually the Caster Chronicles was born.
Garcia has said that she loves writing about magic and its effects on people and society. She wanted to create a world where magic was both feared and revered, and where it had consequences. This is what makes the Caster Chronicles unique and intriguing, and it's definitely one of the reasons why readers keep coming back for more.