You can use a little scripting in conjunction with the command line utility, TABCMD, to email pdf or image versions of dashboards.
This article gives some detail: http://kb.tableau.com/articles/knowledgebase/using-tabcmd
Lénaïc RIÉDINGER, Global Community Engineer Tableau
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Doesn't help. Need help at the work book level. What was provide is useless. But thank you for the effort.