Relax, begin studying the magic diagrams.
You begin to study "Call The Hunter Who Fades When Satisfied"
One thing you understand right away. Whatever this does you need "A dagger of pure metal" to make it work.
((This will take a many days to learn, and you can't really rush it. The material has to be absorbed as much as read. You'll be done in 2d6 weeks. You can continue playing in the meantime. It will just be assumed that you read and think about it a little more when you have some spare time.))
Relax, begin studying the magic diagrams.
Help on this, see if I know anything of them from my magical background.
It's pretty weird. It seems to call for a prop so to speak, "a dagger of pure metal," and a skimming of some sections seem to detail words to be spoken and gestures to be made. That could fit into either stage magic or occult practices as far as it goes.
But that link doesn't go far. A few purported occult books you've looked at have fairly clear instructions; a dead goat and a magic phrase and there's the Devil. Hardly more difficult than placing a phone call. This isn't like that.
There are strange diagrams of twisting and interlocking lines, each segment carefully labeled. There are two pages that look almost like equations, accompanying them are drawings of what appear to be optical illusions, geometric shapes that can't exist. It is completely incomprehensible at first, second, and indeed third glance. But it doesn't look like nonsense. It's well ordered and organized.
((If you decide to study it along with him and compare notes I will reduce the time by 1d3 weeks and you will both learn it at the end.
Also for future reference if someone knows a spell they can teach it to a student quickly. At least more quickly than someone can learn one from a book on their own. Mechanically it's a ~40% chance each week to teach someone a spell you know.))
Edit: Amended, after the brief look which I'm not going to retcon, Harvey Jones decides he wants to be secretive and will no longer share the book.
Boganski, upon noticing the other two start examining a book and having little better to do himself, decides to take a crack at it himself.
Take a look at diagrams, though purely on an aesthetic level without seeking comprehension. After all, this is nonsense at best and actively harmful at worst.
"Perhaps if Corbitt is buried in house, we dig up corpse and dispose of it? Or burn it? Hopefully would improve something."
There's something about a dagger, and what may be a chant. There are strange diagrams of twisting and interlocking lines, each segment carefully labeled. There are two pages that look almost like equations, accompanying them are drawings of what appear to be optical illusions, geometric shapes that can't exist. Every word and line is drawn with exacting precision. It's a bit weird aesthetically, one page will look like some sort of witchcraft nonsense, the next like a mathematical proof.
Pierre walks towards the rest of the group and stands next to Boganski.
"We could just skip digging up the corpse and burn the entire house. It would be easier." He says, shrugging.
Look at the diagrams, see if anything comes to mind.
The diagrams themselves are baffling. From the name of the spell...or whatever, and a few paragraphs of fairly plain English it seems to be instructions for interacting with some sort of creature.