History of "The Desert Perpetual" Lore Book Unlocks

Unlock "The Desert Perpetual" lore book, titled The Immanent, by earning its 8 entries in The Desert Perpetual Raid. It is part of the Atemporal seal triumphs, added in Season 27, and comes from The Edge of Fate-era content.

How to complete

• Entries are unlocked by solving the secret chest puzzle after completing each encounter of the selectable bosses in the raid.
• Each encounter completion with the puzzle solved gives one additional entry; there are 8 entries (Now and hereafter, A perfect when, Down?, The root of unity, Eternal life, You and I and I and you, The last time we were apart, Gloria mundi).
• The book follows Maya Sundaresh after the Upheaval on Nessus; she becomes a hybrid of human and Vex network.

Because bosses are selectable, plan clears so every boss is eventually done with the secret chest solved.