oh wow this is pretty cool XD I like how you use black and white to create an atmosphere, as well as the fact that you took the challenge to use motion books as your format. Maybe you could try to take advantage of that 'motion' part of motion books :3
Interesting idea! You might want to check out a book called The Diary of Victor Frankenstein with illustrations by Timothy Basil Ering, I think you would get some inspiration on how to make this look even more weathered and authentic. Keep up the good work!