Silent Book is a Shadow in the Persona series.
Silent Book appears in Worlds 2 through 5 in Magatsu Mandala within the Midnight Channel. It will act as support for other shadows while trying to inflict Fear with Evil Smile and damage the party with Wind Boosted wind skills. After being defeated, it may drop a Word String. Selling 4 Words Strings will unlock the Kotodama Cape female armor in the shop.
In Golden, Silent Book will attempt to Silence the party. It can amplify its physical damage using Power Charge.