If you need more information on a subject you can read books to what?
Options:
- include information
- explain problems
- get confused
- win prizes
- further knowledge
Let's think carefully first. Step-by-step reasoning process:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Getting more information leads to further knowledge. Knowledge can be gained through reading books. Books can be read to further knowledge. So the final answer is further knowledge.