- "Give it up. It's never going to happen."
- —Pensées-Profondes on the book's subject[src]
A Study into the Possibility of Reversing the Actual and Metaphysical Effects of Natural Death, with Particular Regard to the Reintegration of Essence and Matter is a highly-regarded, celebrated book on the subject of reversing death, written by the eminent wizarding philosopher Bertrand de Pensées-Profondes. It was mentioned by Albus Dumbledore in his notes on Babbitty Rabbitty and her Cackling Stump in The Tales of Beedle the Bard.