trend was a strong revived interest in the romance novel, including young adult romance. With an increase in number of adolescents, the genre "matured, blossomed, and came into its own, with the better written, more serious, and more varied young adult books (than those) published during the last two decades". The first novel in J.K. Rowling's seven-book Harry Potter series, Harry Potter and the Philosopher's Stone, was published in 1997. The series was praised for its complexity and maturity, and attracted a wide adult audience. While not technically YA, its success led many to see Harry Potter and its author, J.K. Rowling, as responsible for a resurgence of young adult literature, and re-established the pre-eminent role of speculative fiction in the field, a trend further solidified by The Hunger Games trilogy by Suzanne Collins. The end of the decade saw a number of awards appear such as the Michael L. Printz Award and Alex Awards, designed to recognize excellence in writing for young adult audiences. The category of young adult fiction continues to expand into other media and genres: graphic novels/manga, light novels, fantasy, mystery fiction, romance novels, and even subcategories such as cyberpunk, techno-thrillers, and contemporary Christian fiction. 21st century Since about 2017, issues related to diversity and sensitivity in English-language young adult fiction have become increasingly contentious. Some fans frequently criticize authors – including those who themselves belong to minorities – for "appropriating" or wrongly portraying the experiences of minority or disadvantaged groups. Publishers have withdrawn several planned young adult novels from publication after they met with pushback on these grounds from readers on websites such as Goodreads. Authors have reported harassment, demands to cease writing, and death threats over social media. To prevent offending readers, publishers increasingly, though with mixed success, employ "sensitivity readers" to screen texts for material that could cause offense. Themes Many young adult novels feature coming-of-age stories. These feature adolescents beginning to transform into adults, working through personal problems, and learning to take responsibility for their actions. YA serves many literary purposes. It provides a pleasurable reading experience for young people, emphasizing real-life experiences and problems in easier-to-grasp ways, and depicts societal functions. An analysis of YA novels between 1980 and 2000 found seventeen expansive literary themes. The most common of these were friendship, getting into trouble, romantic and sexual interest, and family life. Other common thematic elements revolve around the coming-of-age nature