'Frankenstein' is just one of those novels that does it for me. It makes me feel dumber than I am, smarter than I am, and more hopeful for what I could be as a writer than most books. The Shelleys (yes, Percy unfortunately takes credit for parts of it) wrote a seminal work for the horror, science fiction, Romantic, and Gothic novels. So much of the dread and melancholy contained in these pages has spread to later books. However, I love this one, particularly for its symbolic attention to the Prometheus story.
The creature in the novel is spectacular. He's terrifying, yet beautiful at the same time. Many expect 'Frankenstein' to follow some mindless ogre as he kills townspeople, but not this creature. He reads Milton, and laments his lack of family--Victor Frankenstein coldly disowns him at "birth." He faces rejection from everyone, even his creator, and decides that overcoming his creator, after having him make a partner, is the only way to go. His status as an outsider reminds me how all of these characters are outsiders, from Frankenstein losing his mother and marrying science, to his own wife being an adopted child (and weirdly, his own adopted sister!). It's a novel that looks at what happens in the realm of Otherness when all the Others are seeking selfhood.
I won't give more away--you should just read it! It's fantastic, and great reading around Halloween, and of course, the month of November.