At PSM Author Services, we calculate the quote by word count. This means that you are not invoiced for the time that is not spent in the most efficient way.

Standard editing offers you language optimization, including editing and proofreading to ensure that your text flows as if written by native English speaker. Our premium service adds an additional level of proofreading and offers you a further assessment of the language and flow of the document. The senior editor will assess the flow of your manuscript and the clarity once the English-language has been corrected.