Bestseller, blockbuster, top 100 - lists and rankings are central organizational and knowledge structures of popular culture. On internet platforms and social media, they make popular cultural knowledge visible, accessible, and exchangeable. Ralf Adelmann explores the fleeting and heterogeneous knowledge culture of these taxonomies of the popular and demonstrates that they arrange and structure popular cultural products and their reception as media forms. They also provide communicative and media connections for subjectivities and social formations.