Summertime is a time for throwing a blanket on the beach with a good book. It is common place to see entrepreneurs with a book in their beach bag - usually it is biographies of past visionaries or books on entrepreneurship. These books are great for getting to understand a topic, and, while all reading is incredibly important for entrepreneurs, try picking up a fiction every once in a while.
For starters, fiction doesn't have to mean science fiction, although science fiction has its own place in entrepreneurial reading, it can be historical, dramatic or comedic but what most stories have are puzzles. Whether it is the puzzle from a who done it murder mystery or just simply trying to guess what will come next - these puzzles can be great at expanding your understanding of people or of situations. For a great book to wrap your mind around check out: Agatha Christie's Murder On The Orient Express
Another great thing about fiction is that it gives you a sense of culture. Understanding the toll of war felt in Tolstoy's War and Peace, or the roaring 20's in Manhattan from F. Scott Fitzgerald's The Great Gatsby, these stories can take you to a different time and place to understand cultures and time periods. For an entrepreneur, it's important to really understand people and their needs and desires and having an understanding of culture - past, present or future, can truly help understand the human condition. In addition, being an entrepreneur can also tend to be a stressful endeavor, having the ability to escape into a world or different time is incredibly relaxing. For a great historical fiction read Mark Twain's The Adventures of Tom Sawyer.
Lastly, though not the final reward of reading fiction, being an entrepreneur can be entirely insulating and siloed experience, so having fiction allows you perspective. The argument for the liberals arts degree is that the student will become more well rounded and will have a more broadened view - the same argument can be made for reading fiction.