Booktoks are short videos about reading on TikTok, heirs to literary blogs and booktubers. The vast majority are created and consumed on mobile devices. This research conducts a qualitative analysis of content in digital contexts regarding Spanish booktoks. Based on a previous sample of 500 videos, selected through the platform's algorithm suggestions, analysis is carried out on n=299 videos to identify their main characteristics and differences with previous spaces. Extension, audience, quantity of comments, tags used, and profile typology are analyzed. Subsequently, various specific analyses are proposed, such as the most used tags; the most followed profiles from our selection (n=30 )indicating their characteristics and interaction with other digital platforms; and a detailed analysis of several videos to exemplify their characteristics. Finally, n=10 specific booktoks are selected to present the differences with previous models of reading promotion on the Internet. New dynamics are identified, confirming that mobile devices result in shorter videos about books, distancing us from literary reflection.