Dear Employer,
I am very keen to work with you as an editor for your ebook. I am a native English speaker and writer, having written a number of articles myself on a variety of topics, especially related to environmental issues and conservation. Additionally, I have edited a large number of articles and pieces written by others. In the past I wrote websites and promotional materials for small businesses. Recently I have been writing some books of my own. Having studied advanced English grammar, I know I can deliver you an excellent standard of work as an editor. I will charge you 0.05 USD for 10 words and aim to complete 7,000 words daily.
I hope we can work together, I look forward to hearing from you.
Yours faithfully,
David M