Working with an editor is an interesting experience, rather like training with a Sensei. A good editor will pick up on the little things that you don't see until they're pointed out to you - then they become glaringly obvious! 

I've been working with Leslie Takao, an editor at YMAA who is also a martial artist in her own right. It makes a huge difference. Not only does she know about language, but she understands the concepts of martial arts, both philosophy and practice, that I'm trying to get across. It's hard work, because I can't play the 'specialist' card on her, but challenging and ultimately, rewarding.