Book of Prava is a Diablo sourcebook. It is the fifth installment in the Horadric Vault series.

The book is in English.

With Inarius fallen to Lilith and enemies closing in, Reverend Mother Prava turns to Sanctuary's religions to chart her own path forward. Join her in this stunningly illustrated compendium of theological lore from Blizzard Entertainment's Diablo® universe.

Following the Cathedral of Light's unexpected defeat in the Burning Hells, Reverend Mother Prava has returned to Kyovashad broken, with doubt clouding her mind. Lacking guidance from her patron, the Reverend Mother turns to scholarly pursuits as she heals her body and soul, learning all she can from Sanctuary's varied denominations…even as a corruptive force begins to grow from within her own.

Direct from the Diablo® development team and award-winning author Matthew J. Kirby, this immersive tome with dazzling, all-new illustrations showcases the belief systems that have taken root in Sanctuary over eons. From the Cathedral of Light to the cult of the Triune, Prava's exploration reveals how the power of faith can steer one's destiny, or that of all humanity.