Is it possible to make only certain workbooks available on the mobile app?
The question sounds a bit generic. But see if this helps.
With Tableau 10, you can build dashboards, specific to a device in which you can hide worksheets that are part of the dashboard.
Explained further here: http://www.tableau.com/pt-br/about/blog/2016/8/tips-designing-device-specific-dashboards-make-everyone-happy-57548
Retrieving data ...