After any higher-level structural or strategic issues are worked out, the book is ready for the line/copy edit.
Line editing is concerned with content on a sentence and paragraph level. I evaluate whether the content is communicating information clearly and effectively. The line edit also aims to create good rhythm and flow in the writing. So I might combine sentences if a section has too many short and choppy sentences, or I might break apart run-on sentences.
My line edit includes a copy edit, which looks for errors (grammatical and typos) and ensures the manuscript adheres to the desired style guide (for most publishers, this is the Chicago Manual of Style).
I combine the line edit and copy edit because most private authors need more than a simple copy edit.
Price: $.055-$.065/wd, pending review of manuscript