Found: Name the book

Book started off with two girls that had to act like sisters since one of the girls parents died, so they had to hack her ID to make it seem like they were sisters, they did this so that they could be sent to a safer place *a camp* during the ride another girl filled them in on how suspicious the camp was later on with another girls help they figured out they fell in their enemies trap they were in Canada they met like 3-4 boys and as a group they escaped the camp

The Tomorrow Girls series by Eva Gray

>2 Aquila: Thank you for helping me find the books!

I need to this book pls help me


Stability by Fixed Point Theory for Functional Differential Equations.