What was the illegal book that Anne Boleyn gave Henry VIII?

Anne Boleyn is said to have given Henry VIII a copy of "The Book of Hours," which was considered controversial due to its religious content and the implications of personal devotion. This book contained prayers and meditations that challenged the authority of the Catholic Church, which was particularly sensitive during the period of the English Reformation. While not strictly illegal, its significance lay in its challenge to established religious norms and its role in the context of Anne and Henry's relationship.