Same Cloth, Different Pattern (Luke Alvez)

Dr. Sydney Reid has spent years hunting monsters. She knows how they think. How they choose their victims. How they hide in plain sight.
But nothing prepares her for the first letter.
No fingerprints. No return address. Just a photograph of the people she considers family... and a message only meant for her.
Then another letter arrives. And another.
Each photograph is taken from closer than the last. Each message proves one terrifying truth: Someone has been watching the BAU.
Watching her.
As the letters grow darker and the circle around her begins to close, Sydney realizes this isn't a game she can solve with a profile. It's something far more personal. Someone has been waiting for her-for years.
Then the final envelope appears. Inside is one last photograph.
One last choice.
"Come alone... or I'll take your brother.
And after that, I'll take the man who finally made you believe you could be loved."