The Science Teacher's Final Experiment (en Inglés) - Evelyn Grey

Ethan Brooks has always loved science. When the brilliant and charismatic Dr. Malcolm Reyes arrives at Thornhill School with a state-of-the-art lab, a PhD in neurobiology, and a gift for making the impossible feel inevitable, Ethan is the first student to raise his hand. The advanced research program is everything he hoped for, real equipment, real questions, real work.

Then a student goes missing.

Then another detail doesn't fit. And another.

Ethan has learned, through hard experience, that the teachers at Thornhill School are not always what they appear to be. But Dr. Reyes is different from anything the group has faced before. No fangs, no howl, no reflection missing from a mirror. Just a man with extraordinary knowledge, a locked laboratory, and a hunger that has nothing to do with the supernatural, and everything to do with what he is willing to do to survive.

What Ethan uncovers will force him to confront questions that go deeper than any mystery the group has investigated: What does it mean to be human? What makes a person still themselves when everything around them has changed? And how far will a brilliant mind go when it has decided that its own survival matters more than anyone else's?

The Science Teacher's Final Experiment is the fifth standalone novel in the Thornhill School Mysteries series, a mystery built on scientific horror, moral complexity, and the courage it takes to do the right thing when the right thing is not enough. Perfect for readers aged 10 to 15 who want their mysteries smart, their stakes real, and their endings honest.

The secret survives. The school goes on. But some things, once known, cannot be unknown.