Publish a book

I am looking for a freelancer to publish a book I have written. The book is non-fiction and the manuscript is already completed, so no new writing is required. The book has already been edited and is ready for publication, so I do not require any professional editing services. I am looking for someone who can help me publish the book in the most cost-effective, timely and professional manner. I am open to discussing different options, such as e-book, print and audio versions of the book, so I would greatly appreciate a freelancer with considerable experience and expertise in the publishing industry.