The series/trilogy title is yet to be confirmed, but the first book is called Royal Blood - blurb below.
As a member of witch royalty, Melanie Cooper should be one of the most powerful and respected witches of her time. But Melanie was born without an active power - half a witch as they say at her school. Weak. And that's exactly how Melanie feels.
The only way to fix it is to seek out the dark masters - powerful, ancient beings who could give her what she wants, for a price. With Melanie's bloodline coming under attack, she can't afford to be vulnerable. But what if there was a good reason she was never granted an active power?
Basically, it's set twenty something years after the Innocence Cooper series. Melanie is Innocence's daughter, and - as revealed in the blurb - she was born without an active power. Naturally, as a Cooper, she finds this completely unacceptable.
There are a lot of characters from the first series that pop up throughout the story - some just for brief scenes, but some as fairly main characters.
In my tradition of vague release dates, let's just say 'this year'...