Annalynn the Canadian Spy: Sinister Sister - AtCS, #6

Annalynn is about to find betrayal in one of the closest people to her. Secrets have been going missing for days, and no one has any idea who could be behind it. Annalynn's search for answers even takes her to the top of the CN Tower, but the clues point to somewhere much closer to home. Can Agent Annalynn solve the mystery even if her search brings her face to face with her own sister?