Take a look at litplans.com. I just found it, and it looks like a lot to wade through, but I did find some pretty good samples. For example, there's a good one for "Frankenstein" by the Glencoe company and appears to be free.
There are also quite a few Frankenstein plans that are expensive, not mention confusing. But, as I said, I've only had a cursory glance through this.
This site could be the answer to a secular homeschooler's prayers. What a stupid pun. Sorry about that!