What books office workers read in their spare time depended on their personal interests and reading needs. However, some common suggestions might include: 1. Fictions: Fictions are a good way to kill time. You can choose from various types of novels such as science fiction, horror, history, fantasy, etc. You can also choose some light and interesting novels such as romance, fantasy, etc. 2. Prose: Prose is suitable for those who like to think. They can think deeply and explore their hearts through reading. You can choose some beautiful prose collections such as the prose collections of the Eight Great Masters of the Tang and Song Dynasties. 3. Biography: Biography is a good choice to understand a person's life story and career achievements. It can allow office workers to understand the stories and life experiences of different characters and enhance their knowledge and experience. 4. Self-help books: Self-help books can help office workers improve their self-abilities, such as the Seven Habits of High-Performance People, Wisdom Backpack, etc. 5. Science books: Science books can help office workers understand more scientific knowledge, such as A Short History of Time, The Big Bang, etc. Office workers could choose their favorite books to read in their spare time to improve their knowledge and quality, and also to enrich their life experience.