The cost of hiring a professional freelance editor will depend largely on the amount and type of editing needed. It might seem like a substantial investment, but it's important to keep in mind that you are paying for a professional's expertise and time, says author and freelance editor Jason Schmetzer. If you are needing more than copyediting or proofreading, you are going to have to invest more. When researching freelance editors, Schmetzer recommends looking for positive reviews and testimonials and for someone that is honest and open about rates up front. He warns writers to be careful of sites like Fiverr, an online marketplace for freelancers, because you will find a huge range of cost estimates and levels of expertise. Look for reputable service providers and inquire with other writers to get referrals. Schmetzer also recommends starting small with a freelance editor - have them review a chapter or two before having them review the whole book. The keys to a good working relationship with a freelance editor are trust, communication, and mutual respect. When hiring a freelance editor, writers must request and be prepared for honest feedback, good or bad.