Hex Hall series FanFiction, including School Spirits. All these books by, of course, Rachel Hawkins.
Sophia Mercer/Brannick/Atherton, confusing name, right? Well, she is a demon. No, I'm not being mean, she literally is a demon. She's related to Ainslinn Brannick, who is Grace Brannick's sister, who, of course, is Sophie's mom. Ainslinn Brannick has two daughters, Finley, or Finn, and Isolde, or Izzy.
Finley went missing three years ago, sadly. Izzy is eighteen now and not the funny and sarcastic little girl Sophie knew four years ago. They also adopted a boy named Dexter, or Dex, for short. Funny boy, he is.
Well, I can only give you introductions and stuff, but not the really juicy details. You won't know why this book is called secrets and surprises until you read on.
Of course, that's if you dare to.
Sincerely,
CaramelRevenge/vcarmen87
:P
P.S.: Cover created by @The-Angel-within
updated every other Thursday