Frankenstein's Book - Puzzle Book Experience

There is a journal, an old one, where the fervid Doctor Viktor Frankenstein dutifully noted the steps of creating his greatest work. There are some newer notes scrawled haphazardly along the pages, added at the end of his life on his deathbed. He encoded some sort of a message for his loyal mad assistant, Ygor. I hope it's the keyword; If it is, I can perform the procedure and save people from the horror that's about to come.

I know, it sounds crazy, I do. But I've SEEN him. Yesterday, deep in the woods. A horrible, deformed shape. Gurgling, digging up old, long forgotten graves. I am terrified. Please, I need your help. I’ve tried so hard to understand the keyword but no matter what I try I just can’t seem to grasp it and we’re running out of time! I'm sending YOU the journal. I hope you can decipher the messages in my place. Otherwise... we might be looking at an unstoppable army of the dead...

Players - 1-6
Time - 60-120 minutes
Book - A4 Spiral Bound + Body Parts Sheets
Difficulty - Medium-Hard