Three tests before a title goes on sale
Anyone can publish a PDF. These are the filters that decide whether a manuscript becomes a ZenTesto book, and they are the reason the catalogue is six titles rather than sixty.
One problem per book
Every title answers a question a reader can state in a single sentence. A chapter that does not serve that question is cut, however good it is on its own.
Read by people who do the work
Drafts go to eight to twelve readers who face the problem in their own jobs. Where they stall, we rewrite. A section nobody finishes does not ship.
Kept current, or withdrawn
Editions are dated. When the material goes stale we publish a new edition, give it to previous buyers free, or take the book off the shelf rather than keep selling it.