Ai'daran Sanei: The Blue Grimoire

Set into the wooden cover of this tome is a stylized castle worked in deep blue stone. The towers branching out of it are wildly different in form, from slender needle-like structures to cylinders bristling with jagged spikes.
Along the bottom, carved into the wood, are tiny and generally indistinguishable figures...some humanoid, some obviously not. A few winged figures can be seen in the background sky, small against traces of cloud.