@ Pimmylove yep, Kalos is book 4. Many things are planned that I won't spoil. But the events of book 3 make book 4 very interesting.
The death of her parents was hinted at being more in chapter 1 of book 1, when the police didn't tell Sycamore any details. This story will come back around eventually, I have great plans. I have a reason they died and a whole storyline around it.
Books from now on will be shorter than book 1 was, because book 1 took place over one and a half years, future books are around a year or less depending on what book.
That's why we start keeping track of seasons more closely from now on, because her age will matter in the story later on.