- What else do they need to [[believe]], [[know]], or [[do]] to [[learn]] the thing we are trying to [[teach]]? - For alpha [[testing]] [[books]], leave potentially influential reviewers for last. - Reader experience [[design]]. - Cut out excess to pack more of what [[people]] want into the [[text]]. - Does the [[book]] give something they [[want]], something that works, and something that invites them to [[play]]?