Concept: “A bestiary brimmed with 105 pages, 42+ Occult monsters, including Esoteric scriptures to die for, and Hopeless dungeons to die even more for.”
Content: Monsters and scriptures and dungeons, Oh my!
Writing: Text ranges from bloviated to concise; brisk to simple. But it is reliably miserable.
Art/design: A menagerie of styles as creative and varied as the community which spawned them.
Usability: Divided in three sections with a full index to aid navigation. Entries of varied accessibility and ease of reference at your table.