If you're looking to have your book edited by an expert eye, then I whole-heartedly recommend Tiffani Angus at www.tiffani-angus.com/editing.html

As well as being a wonderful person to work alongside, Tiffani has a ton of experience working for major and private publishing houses,  meaning you're leaving your work in safe hands.

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Taken from her website:

In addition to being an author, I am also an editor, proofreader, and formatter. My experience includes a variety of skills:
 

• I currently work as an editor, copy editor, and proofreader for major SFF/H publishing houses and private SFF/H-writing and academic clients; I also do layout/typesetting for private clients. During my freelance years, I've worked with various corporate and private clients in industries as varied as advertising, medicine, and education.

• As a senior lecturer in Creative Writing and Publishing and as the course leader on the Creative Writing MA and co-course leader on the Publishing MA at a UK university, I worked closely with undergrad, MA, and PhD students as a supervisor for their major projects and dissertations, providing support, feedback, advice, and encouragement on their fiction and non-fiction work.

• As an educational-materials developer, I wrote and edited textbooks, assessments, and ancillary materials.

• As a technical writer, I built online help files for a government contractor.

• As a newspaper copy editor, I wrote various elements for and copy edited and proofread the features page of a city newspaper.