A Newbie’s Guide to Publishing. If you have read some of the other books, and you enjoyed them, (Which I did) then you'll probably want to check out some of the others. (Which I definitely will) There's a chance you've read everything except the books by Douglas Clegg. If that's the case, then he probably just sold a few copies of his books.
List provided by Amazon' List Mania and Douglas Clegg.