Goodreads is a website which was launched in 2007 with the purpose of connecting users around books. It is a type of social network for readers. This paper investigates the existence of readers' advisory in book reviews among the users in a group which gathers Goodreads users from Croatia. The aim of this paper is to discover how are writing book reviews and readers' advisory on Goodreads interrelated and how the users react to recommendations and advice given to them by other Goodreads users. The additional aim is to detect the expressions which the users from Croatia use in their book reviews to describe a book's appeal. Two methods were used to reach these aims. Content analysis was used to analyze book reviews for the purpose of detecting book appeal expressions and an online questionnaire was used to collect information on users' opinions and attitudes about Goodreads usefulness to their reading experience. Based on the obtained results, a set of suggestions is given to professional librarians so that they understand and employ the benefits of Goodreads in their own work, especially concerning readers' advisory service.