A Sacrifice for Salem

Synopsis
The novel follows Mary, a girl from 1867 who is sent to the present day by her foster-father, Charles Dickens, and a man from her future. She soon discovers a plot to resurrect the long-dead Witches of Old Salem, the people who were murdered by humans during the Trials. Mary and those around her are then forced to go to Salem with the intention of stopping the Witches of Old Salem from coming back and enacting their revenge upon both the human and the magical world.

Parts
ASFS is separated into four distinct parts:

Part One: Magic
The first part encompasses Mary's discovery of the magical society and the introduction of the other POV Characters, Ashton Moore, Callum Denham, and Florence Gale. When Mary wishes to visit the grave of her foster-father but is denied by the headmaster, Joshua Hamilton, she takes it upon herself to escape. Upon finding Fred's grave, she also discovers a wand that has been left for her. The wand warns Mary of the coming return of the Witches of Old Salem. When the others are sent to find and bring Mary back to the Academy, they are ambushed by a Lycan, resulting in the maiming of Callum that sends him into a coma.

Part Two: Salem
Mary and the others, including Reginald Denham are captured by Sentinels Welsh and Marsh, who wish to take them to Atlantis for questioning. However, once they tell the Sentinels about the Witches of Old Salem, they are told to go with them to Salem itself with the goal to verify if they're telling the truth, and if so, stop the return from taking place.

They are, however, captured on the plane to Salem by a vampire named Viktor and his student, Nilo, who take the group to an abandoned school in Detroit. When they fight their way out of the school, both Sentinels are killed by the vampires, leaving them on their own. Ash is injured by a chupacabra named Ursula, and Reg chooses to leave the group after an argument.

Part Three: Scattered
Ash, Mary and Florence try to walk their way to Salem, only for Ash's wound to become infected, slowing them to a crawl. While Mary goes ahead to look for help, Ash and Florence are attacked by a group of Dire Wolves and are only saved at the last minute by Mary and a human doctor. Zeke takes them to his house and treats Ash. Though not fully healed, the group insists on moving on and crossing back into the US via the Rainbow Bridge. Zeke reluctantly takes them there, where they are attacked by a mysterious witch standing on the Niagara river. They attack the bridge, sending a tidal wave across it. Mary holds it back in an attempt to protect the others, but is swept into the river, where she communicates with Cassandra, in a Purgatory State. There, she shows Mary how she was killed in the trials and her family executed alongside her. Meanwhile, Ash and Florence are cornered by an investigating Sentinel, but are saved by Reg, who knocks him out. Mary then leaves the river and manages to reunite with the other members.

At the same time, Callum forms a tenuous alliance with Damian and with Lee, they begin to plot an escape from the academy to go to Salem.