Poison by Bridget Zinn is a young adult fantasy novel that follows sixteen-year-old Kyra, a Master Potioner, who believes her best friend, Ariana, will destroy their kingdom. After failing to assassinate Ariana, Kyra becomes a fugitive and embarks on a journey to stop her, learning valuable lessons about trust, friendship, and love along the way. Kyra discovers that Ariana has been replaced by a shapeshifting imposter, and with the help of a charming adventurer named Fred, she unravels a conspiracy led by the villainous Arlo. In the end, Kyra clears her name and begins a new chapter with Fred, realizing that love and self-acceptance are key to her future.