Research needed for book

Hello, I am a KDP self-publisher, and I currently have a book that my editor is working on. We need someone to research to verify some of the sources in the manuscript. I think it should take about 4 hours, but if more time is needed we can discuss.

Please reply with the word "fire" in the subject line.

Right now I can only promise this one time gig but I have needed tasks come up all the time.

I am offering $5 hour.