This started out promising...It's well written, the characters seemed interesting, and there is a strong female protagonist. However, by the third book, it all just becomes a muddled mess. I keep reading it on Galatea, hoping somehow ends will be tied together, but no luck so far, so I'm going to abandoned this read.
If you are going to write a multi book series, the characters you introduce in the first couple of books need to remain and get fleshed out. Ariel (protagonist) used to be very close to her dad, but by the third book, he isn't even mentioned, and her abusive mother takes front and center. Her benefactors when she joined the Scripture Pack - also a memory. Why not use this opportunity to fill us in on some back story? There were SO many new plots/subplots introduced in the third book, it's almost cringeworthy. Alex loses his cojones. Ariel suddenly can't think for herself, and doesn't remember an important fact when yet *another* mini crisis occurs (deliberately kept this tidbit vague so I don't spoil it for others).
Keep your main characters consistent. They can make mistakes, but don't suddenly change their basic personalities, it's frustrating to see. Karen Marie Moning has 11 books in her "Fever" series, and the undercurrent of main characters remain the same and present in each book. Some may have a moment of prominence, but in reading the series, you learn more and more about each character. THIS is what DanniD should be doing.
If you're going to read this, I'd say stop at book 2.