This book provides a detailed exploration of profit-driven biblioclasm, centring on the case of a Book of Hours, part of the Brooklyn Museum's holdings until 2021. Facing financial difficulties exacerbated by the COVID-19 pandemic, the museum chose to deaccession and sell various pieces, among which was a manuscript from the Mary Benson bequest of 1919, later dismembered by an American dealer who had purchased it at auction. Whilst examining the moral complexities surrounding these sales and the destruction of irreplaceable European cultural artifacts, the book uncovers the identity of the original owner of the manuscript, and provides a digital reconstruction of the original text.This book not only brings to light a critical occurrence but also discusses wider issues of cultural conservation and ethical responsibility in the art world. Its global significance and focus on a notable event in art history render it an indispensable read for those dedicated to safeguarding our collective cultural heritage.