Start with high-confidence ya sibling stories books, then narrow by subgenre or adjacent topics.
Thirteen Doorways, Wolves Behind Them All
Laura Ruby
Far From the Tree
Robin Benway, Sophie Lamotte d'Argy
If Only I Could Tell You
Hannah Beckerman
Disappearing Act
Jiordan Castle
The Alternatives
Caoilinn Hughes
Vaulting Through Time
Nancy McCabe
If You Find Me
Emily Murdoch, Tai Sammons
Sisters in the Wind
Angeline Boulley
US Without You
Vicky Skinner
Homecoming
Cynthia Voigt
Out of Reach
Carrie Arcos
The Flowers in the Attic Saga (boxed Set)
V.C. Andrews
The Last Letter
Rebecca Yarros
Family of Liars: Deluxe Edition
E. Lockhart
