Frozen Guardian(Jelsa)

Book 1 of 2
Book 2 is Spirits

Jack Frost, newly inducted member of the guardians, will not be so new any more. Manny has just revealed a new guardian, a girl from the kingdom of Arandell. Unfortunately, a snowstorm blocks out the rest of the image before the guardians or Pitch can see who it was exactly.

They know that there are two princesses there, one with courage and a big heart; the other with a secret power. Before the guardians decide who it was, Pitch makes the decision for them. He goes after the younger one, Anna.

Jack chases him and promises to protect Anna until her time comes, but that can be very difficult when Pitch is trying so hard to kill her and Jack falls in love with Elsa. Jack does his best, but feels something is wrong. What if they have the wrong girl?