Book royalties belong on Schedule E if you did not have a business writing books.
There are two options for reporting book royalties, and depending on which option you choose, the income will be reported on a different schedule on your tax return. The first option, "natural resource or intellectual property" will flow to Schedule E, while the second option, "being self-employed as a writer, inventor, artist" will flow to Schedule C.
Here are the instructions for reporting How do I enter a 1099-MISC for royalty income?
