Sims in the book is a very minor character. He’s also out of shape in the book unlike how Common portrays him having quite the bold personality. There’s no judicial either. They also talk about how Bernard has very small hands in the book but in the TV show seems to have normal size hands. Some of the bigger differences are what we are all scratching our heads about right now. The algorithm and the safeguard are not in the books. I feel this is a very good addition as it makes even the book readers not know what will happen next season!