Shout-Out: The Faithful by S. M. Freedman

For Agent Josh Metcalf, memories are ghosts. They are blood-soaked backpacks and the smell of strawberry Chap Stick. Josh is haunted by a little girl who went missing his first summer on the force. Decades later his search has become an obsession, and he's pinned the photos of hundreds of missing children to his wall of tears. All the children had psychic abilities. All the cases went cold -- with no witnesses, no useful tips, and no children ever recovered. Until a woman gets injured trying to stop an abduction, and Josh comes face to face with his personal ghost. 

For Rowan Wilson, a meteorite hunter for NASA's Spaceguard program, memories are lies. The childhood she thought she knew has been erased, leaving a black hole in its place. New recollections are flaring to life: men dressed like priests, a ranch in the mountains, mind control, and rape. Each new memory draws her closer to one of the other missing children, Sumner Macey; and to I Fidele, the underground organization for whom kidnapping is just the beginning.

For Sumner, memories have become weapons. He's sharpened each of his with surgical precision: the ranch, the doctrine, the mind-wash, and the murders. He's eager to slice at the black sludge pumping through I Fidele's heart, desperate to cripple those who stole his childhood.

To I Fidele, non-psychics are cockroaches in need of extermination, an inferior species destroying the earth. They're ready to enforce eugenics on a global scale. If they succeed, only those faithful to their doctrine will survive.