Ebook Proofreading (US English)

I’m looking for a careful proofreader to scan my ebook—currently a Microsoft Word document—for spelling and grammar errors only. Please keep the voice, structure, and style exactly as they are; all I need is a clean, error-free manuscript that meets US English conventions... (Budget: $30 - $250 USD, Jobs: Content Writing, Copy Editing, Copywriting, Editing, English (US) Translator, English Grammar, Proofreading, Technical Writing)