To the untrained eye looking at this PDF, this section appears to be Chapter 5: Drug Absorption and Distribution. But if you are reading this, you have bypassed the cipher.

He flipped to page 342. In the margin, written in tiny, immaculate handwriting that had survived fourteen years of silence, were rows of chemical symbols and a single, desperate message: Remember for those who cannot.

They are coming for my research. They want to weaponize it. A world where governments can erase the memories of dissidents is a world without history. I have hidden the master synthesis formula for the antidote within the actual, physical copies of the 2012 4th Edition. Look at the chapter on 'Drugs Used in the Treatment of Reversible Airway Disease.' Look at the margin notes on page 342 of the printed book.

They think I am studying the mechanisms of action. They see me in the library every night with the heavy, physical copy of Brenner and Stevens splayed open on the desk. They don't know that I have gutted the digital version. This PDF file is the only place I can safely write the truth about Project Lethe.

Sterling’s heart skipped. He was a professor of pharmacology, but before that, he had worked in experimental drug development in the early 2010s. He knew what Project Lethe was. It was a classified, highly controversial research initiative aimed at creating a pharmaceutical compound capable of targeted memory erasure for trauma victims. It was abandoned in 2013 due to "unresolvable safety concerns." Or so the public was told.

Sterling sat back, breathless. He looked over at his office bookshelf. Towering among dozens of heavy medical volumes was a thick, worn-out paperback with a blue and white cover.

The file name was cut off by the edge of the window. He clicked to open it.

Professor Sterling adjusted his glasses and stared at the digital glow of his monitor. For three hours, he had been trying to find a specific drug interaction table in his digital library, and there it was, the exact file name he needed: