I'm looking for a book based on Shelley's "Frankenstein".
The book was written as if it were a nonfiction text about Victor Frankenstein as a real, historical person. In a very dry, factual manner it recounts his life and studies, and then the creation of his monster with excerpts from his diary and notebooks. The book features drawings, purportedly by Frankenstein, of his research executed in a style appropriate to the time, mostly black & white charcoal sketches done in a loose but very detailed style, of equipment, anatomy, dissections and "life studies" of the creature.
I believe it came out in the 80's or early 90's. The format was hardback, and as noted it was heavily illustrated.