The Sum of Small Effects: Meta-Analysis and the Evidence for Psi: Judge Parapsychology's Most Contested Statistics for Yourself, by Errol Crane

From the back cover: A century of experiments. Thousands of results. Still no agreement. Meta-analysis was supposed to end the argument over psychic phenomena by pooling every scattered study into one honest number. Instead it became the battlefield. This book builds the method from the ground up in plain language, then walks you through the card-guessing decades, the ganzfeld controversy, the remote viewing years, and the precognition paper that shook psychology. You will learn where the argument actually turns, why identical data produce opposite verdicts, and how to weigh an extraordinary claim for yourself.