If you are referring to the novel "The Adoration of Jenna Fox," here are study guide links.
http://www.bookrags.com/studyguide-the-adoration-of-jenna-fox/#gsc.tab=0
http://www.supersummary.com/the-adoration-of-jenna-fox/summary/
There are many characters named Jenna. If this is incorrect, please repost your question and include the title of the work.