you also need to add it to the pattern-match, ie:
  When /^I import the work "([^\"]*)" by "([^\"]*)" with email "([^\"]*)"$/

and then you will have to change the actual test to look like:
  When I import the work "External Work To Import" by "Some External Author" with email "external@author.com" 

and then you would ideally make sure that an email gets delivered to that address and the story shows up with the external author name in it.