Along with a brief description of your topic, I’d like to see a table of contents and a brief writing sample. Here are other questions for you:

• How long is your manuscript? (number of chapters, number of pages,
  word count—any of these will do)
• What stage have you reached in the project?
• What are your goals?
• What is your timetable?
• Where are you stuck?
• How might I help?