The aim of this bachelor thesis is to compare book blogsabout teenage literature, two blogs written by librarians, twoblogs written by youth. The aim is to find similarities anddifferences with focus on how the blogs reach the target audi-ence of youth and how the blogs work with reading promotion.The method used in this study is a qualitative content analysisof four blogs. The study uses two different theories. A enquiryscheme partly influenced by a study by Connie Crosby con-cerning how to be an effective blog. Also a theory taken fromJofrid Karner Smidt and her three approaches to reading pro-motion: the promotion on demand, the active recommendingand informing promotion and reading promotion in dialog.For the library blogs to better reach the target of youth theyshould try being more personal and recommend other bookblogs in order to be a part in the blog community. Theyshould also stimulate the interactivity by being thorough andanswer all the comments they get on the blog.The result concerning reading promotion shows that thelibrary blogs appears as accommodators while the youthblogs appears as readers. All blogs write mainly about newbooks and the library blogs should think about promotingsome older books as a complement to the youth blogs.There are also a clear difference between the approachof reading promotion. The youth blogs represent the promo-tion on demand while the library blogs represent the activerecommending and informing promotion and reading promo-tion in dialog.