"A sheaf of lined, blue paper sewn together with silk thread."

An interesting book by the Barathrum the Old about the dark calculus. It is also one of the items that mention the mysterious character Ptoh.

Gifting this book to Sheba Hagadias will give you 3600 XP.

Full Text Edit

Spoiler Warning! Below is a full text of the story!

Coq darkcalculusp1
Coq darkcalculusp2
Coq darkcalculusp3

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