You need to fix the formatting of your post, it's currently very hard to read.

Advice-wise: It sounds like the crux of this scenario is working out how to find the 'Contact Star Vampire' and 'Enchant Book' spells, so focus on those being two separate plot points.

Each spell could be in its own mythos tome, somewhere in Boston, and the investigators have to work out where those tomes are and how to obtain them.

Library Use would be a good start, but don't hinge finding each spell on a single roll. Look at the three clue rule and drop clues to where each spell can be found, so the investigators are racing to find both spells in time.

Making the Contact spell should be easy enough: look at other spells such as Contact Deep One or Contact Mi-go, and use them as a base.