Blackthorn's Orizon

From the introduction:

This truly exquisite book is fashioned of navy blue boar's hide expertly bound and stitched with gold silk thread into a full-fitted cover encasing two 1/4 inch thick slabs of teak wood. The edges and corners of the book is set with white gold. A sigil of solid mithril is inlaid upon the front cover. The sigil is a large circle with two smaller circles inside the large one. The two smaller circles; one is north one is south neither touch each other but both touch the larger circle.

User summary:

Blackthorn's Orizon is a little-known, intriguing "net book" of spells. All of the spell names begin "Blackthorn's..."