We need a writer to join a story of 75 pages to another story pdf file

I am looking for a talented and experienced copywriter to join two stories together. One story consists of 75 pages and the other is in the form of a PDF file. The genre of the story is non-fiction and the style of writing will be informative. The copywriter should have an excellent command of the English language and be able to convey their messages clearly and concisely. It is important that the copywriter be able to work to tight deadlines and ensure that the joining of the two stories is completed within an agreed time frame. It is paramount that the writing is original, of a high standard and fully vetted for quality.