I may need to revise my bid amount, depending on the length of your book.
I registered with Freelancer in February this year and have 46 reviews, all positive. English is my first language and my skills include technical writing, editing and proofreading.
I recently edited a 65,000-word science fiction novel and the client was so pleased with my work that he commended me to Freelancer - and an article about me has recently been published https://www.freelancer.com/community/articles/57-year-old-discovers-a-lucrative-career-on-freelancer-com
Other recent work has included proofreading five theses, as well as individual chapters of academic writing.
For two years I was a copy editor for Elsevier Science Publishers in Amsterdam, the Netherlands, rewriting text by authors who were not native English speakers.
I have worked with individual clients to bring 14 books to publication and three of these clients have rehired me to work on a second book.
Having been a teacher of English in high school for several years, I have spent many hours making corrections and suggestions for students' essays. For an additional two years I was a teacher of English as a second language.
For six years I have been a member of a writing critique group, regularly reviewing the stories submitted and occasionally writing my own.
I would use the Track Changes tool for your document, inserting comments where necessary.