A Chumash is a book version of the Torah, often filled with commentary from great rabbis throughout history. A Chumash is not only used to follow along when reading the Parsha but is also used for learning purposes. Those Chumashs with commentary allow a deeper insight as to what is happening and gives alternative meanings, as well as underlying meanings to the story based off the words chosen, how they are spelled, or even just simply what it says.