a libram

This thick tome consists of two square covers, over which the grey hide of a
beast has been sewn. A silver clasp is affixed along the edge of the book,
sealing it. The spine consists of a series of glyphs and wards.

It is a libram.
It weighs thirteen pounds.

You identify a libram.
It is an unsellable object.
It weighs thirteen pounds and four ounces, and it is worth about ten celeb.
Its keywords are book and libram.