The table below shows the number of books read by students in a book club over a month. What is the mean number of books read by the students?

| Student | Books Read |
|---------|-------------|
| Alice   | 5           |
| Bob     | 7           |
| Charlie | 3           |
| David   | 8           |
| Emma    | 6           | Let's think step by step and output the final answer within \boxed{}.
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