Solasis is a first-rate editing company, extremely quick, accurate, and thorough. I not only screen for grammatical errors and typos, but will indicate formatting and layout inconsistencies, or when the meaning is less than clear.
All writers need someone else to review their work. No one wants her meaning or effectiveness to be watered down by errors, bad grammar, or incorrect usage.
I can find a needle in a haystack. I constantly find errors in books, regardless of genre. Can you imagine how frustrating an error in a difficult math or programming example is to a reader? (I can find those too.)
I enjoy editing. It's how I got my start in technical writing. Doesn't your writing deserve some extra polish?