Using a discourse analytical approach this thesis examines a selection of user reviews concerning Stephenie Meyer’s Young Adult Novel Twilight, published at LibraryThing 2009-07-01 – 2010-12-31. The aim of the study is to identify and shed light upon the conceptions relating to target audiences distinguishable in the reviews and to discuss the possible consequences of categorizing fiction by age of the intended reader. In order to accomplish this, the study examines the conveyed images of Young Adult fiction and grown ups’ reading of Twilight. The thesis concludes that several discourses regarding Young Adult fiction are distinguishable in the material; some of which concern level, quality, and writing style, others thematic and contentbased aspects, while one concerns fiction aimed specifically at girls. The thesis also concludes that grown ups’ reading of Twilight is sometimes portrayed as normal and sometimes as abnormal, and that some aspects of the book are made out to be problematic for an older audience while other aspects are made out to be less so. Furthermore the results suggest that discourses which associate a certain kind of content with a certain target group might have a restricting effect upon potential readers.