It is not known whether Elon Musk reads extensively, as his reading habits are not widely publicized. However, as the CEO of several companies, including SpaceX and Tesla, it is likely that he reads a significant amount of material related to his work. In interviews and public statements, Musk has spoken about the importance of staying informed and being curious about the world, which suggests that he values reading and learning. Additionally, Musk has cited science fiction books as a source of inspiration for his work, particularly his ideas about space exploration and colonization. Overall, while it is not certain how much Musk reads, it is likely that he values the role of reading in staying informed and engaged with the world.