This volume presents interdisciplinary research on children’s texts and media, transmedia storytelling and transmediality across production, artefacts, and reception.Based in international, interdisciplinary research, the chapters explore a wide range of transmedia narrative phenomena. They highlight narratological issues of world-building, analyze the interplay between transmedia franchises and seriality, investigate networked reception in fan communities, and discuss the relationship between conventional literature and fan works from the perspective of young fanfiction authors. Interviews with international actors from production companies and new educational institutions create dialogues between research, development, and production. The book bridges international research from book history, media studies, and children’s literature studies. Combining a focus on digital and analogue media and pointing to interactions rather than ontologies of separate genres, texts, and media, the volume seeks to inspire future studies and practices, including work that recognizes children not only as users but also as creators.