I haven't read the book and I doubt I will get around to it. If there are some significant events that take place through the book that perhaps the film skips over that would be helpful and appreciated.
There are quite a lot of differences between the movie and the book. Some prominent ones:
- the three women were witches with power before the warlock Darryl showed up. He was actually drawn to Eastwick because of their powers.
- after peacefully living together, Darryl marries Jenny, a young and innocent friend of the three witches. So he leaves them, not the other way around as in the movie. In revenge they give Jenny cancer. When Jenny dies, they realise their mistakes and question their own judgement. Chris, Jenny's brother, leaves town with Darryl. After that all three witches leave town as well.
- there is a sequel, the Widows of Eastwick, which takes place thirty years later, when the three witches return to Eastwick and Chris takes revenge on them for Jenny's death.
The witches are far more amoral in the novel, particularly Jane. They are by and large indifferent to Felicia's murder, even suggesting that she brought it on herself with her nonstop, self-righteous ranting.
********************** In heaven everything is fine.
Everything everyone's said here pretty much answers the question. I'd love to see a remake of this film that's more faithful to Updike's novel with less comic caricatures. They could get away with the original ending nowadays more than they could in the late 80s as well.
I haven't read the book for 25 years, but I do remember it's nowhere near as fantasy like as the movie. The witchcraft is far more age old and mild (eg curses) as opposed to explosions, fire and extreme voodoo. Also, the female characters personalities are somewhat different.
There is also a much longer plot to do with Richard and Felicia's children, along with lesbian subplots and the fact that Darryl Van Horne basically turns out to be gay, less so than the devil! It's a good read though, so it's worth getting hold of.
Know what? There're these things called Cliffs Notes that would answer your question in a jiffy . . . or there's this thing, The Oxford Companion to American Literature that would . . . oh, wait. Sorry. I just realized that you're a lazy, stupid fuck who doesn't feel like reading.
Or... how about he just asks the question in a movie board so that people who know can answer, which they’re clearly more than happy to do, and other people with the same question, like me, can also benefit from the discussion?