But say something. You are seeking to entice the reader into seeing the world your way. Just a piece of information offered without any human colour.
Short and sweet is the goal, but remember to give enough information on each chapter to entice the reader. Why should anyone listen to you? That being said, always give yourself the best shot by writing up the most engaging chapter.
For subject-led non-fiction, the chapters can be non-contiguous.
When is something finished, anyway?