Hi. I can help put the finishing touches on your book, correcting the English grammar, spelling, vocabulary, punctuation and sentence structure, and offering suggestions for making your ideas clearer, if needed. Although I live in Brazil now, I am an American writer, editor and proofreader, a native English speaker with excellent language skills and years of experience at revising and completing books and academic texts. During the past year, I have assisted the authors of 2 supernatural thrillers, a collection of romantic short stories, 2 non-fiction self-help books, a musician´s biography, the story of a Chinese monk´s search for enlightenment, and I´m currently finishing the revision on a book about using natural treatments for diabetes. You may think "what does this guy know about math?" The fact is, what I need to know is how to help you express your ideas in a way that your readers will understand what you have to teach, and I can do that. I use Word´s Track Changes to show you all my corrections, comments and suggestions, and interfere in your own personal writing style as little as possible. Assuming that a large part of your 15-16 pages is numbers instead of text, I would like to know the number of words in your text, or see the text itself to determine how much time and work it will require, and how much I should charge you for my services. My base price is $10/1000 words, or $4 per page of 400 words. Please contact me for further discussion. Thanks, David