The Codex of Technomantic Synthesis

This massive tome is encased in a shifting shell of polished brass and silver gears. The cover features a central glass lens that glows with a soft azure light when a hand is placed upon it. Inside, the pages are composed of impossibly thin sheets of a translucent, metallic alloy. When a reader focuses on a page, the static diagrams of clockwork joints and rune-engines begin to move in three-dimensional space, demonstrating precise assembly steps.