Though I've often found if you want a sense of the original, mostly imagine a book based on the complete opposite message of the film. Spoilers... In Minority

Though I've often found if you want a sense of the original, mostly imagine a book based on the complete opposite message of the film. Spoilers... In Minority Report (film), the protagonist does everything to save one innocent abused by the state. In the book, well, let's just say if you want a perfect society you've got to break a few eggs. In Paycheck (film), he sides with government regulators to stop a corrupt corporation. In Paycheck (book) he sides with a corrupt corporation to take down the government. In The Golden Man, the government hunts a powerful and dangerous mutant. In Next, the powerful mutant sides with the government to stop terrorists. I know Dick wasn't in favor of killing cops or corrupt corporations or hunting down people who are different, but the best thing about all of those stories is that they put the protagonists in these sort of awful lifeboat ethics dilemmas, dilemmas that are apparently far too interesting to waste on film audiences.