I replied that my target audience is Christian educators. That includes pastors and directors of religious education, who are professionals. I need to tell them things that will warrant their paying attention.
But that also includes a lot of volunteer Christian education chairs, VBS directors, and volunteers with only a general education but some good church experience. So it has to be accessible.
Lots of people want a CE book that is basically a book of recipes: programs, lesson plans, handy-dandy never-failing last minute activities, etc. And I'll have a few of those things. But what we're really lacking in the field of disciple-making is anybody making a CURRICULAR argument: what do we teach? how do we teach it? how do you know what you need to do next?
I think I can offer both professionals and volunteers something they will find helpful. But it will stretch all of them, at least some. If it didn't, they wouldn't need to read my book, and I wouldn't need to write it.
On the other hand, even God needed an editor. But I've got to write the thing before we can edit it.