I highly recommend reading the book. It’s a great read, more gritty, goes into more detail in many ways, has more focus on corporations being a plague on modern world (very much cyberpunk-adjacent themes), and the best thing is that some (but not all) characters that survived the movie die in the book and vice versa, so it’s still very suspenseful even if you’ve seen the movie a million times.

The second one is a good read too.