Boring materials do nothing, and books aren't cool to look at.
Make the Book of Dark Rituals a curse haze bomb, but also keep its functionality as a way to summon Margrel.
The book sits on the ground during the fuse, but when it goes off it bursts open to a random page and releases a curse field.
This functionality fits with it's background too, because Margrel unleashed the Kataclysm by opening the book.
If you're going to have coffee cups and snowman heads act as explosives, a book is not out of the question.
I agree.
But what implications would this have regarding the hierarchy of Bombs? Would the Book of Dark Rituals merely be a poor man's Shivermist Buster or would it be a status symbol like Combuster and Amputator are for Swords?
And do you intend to give readers of the book a damage boost to their bomb if they also have the glasses accessory equipped? It would be another slap in the face of Skolvers who can't equip glasses... We already miss out on the Luck aura bonus to get better UVs at Punch and honestly I crafted Skolver because I wanted to be part of the pack.