Emerging Formats started as a project in 2017, when the British Library, together with the other five UK Legal Deposit Libraries, began investigating the rise of new complex digital publications that could pose new challenges for libraries and other cultural institutions in terms of collection and preservation. These 'emerging formats' are born-digital publications with no print counterpart, often consisting of multiple media types, with strong hardware and software dependencies and thus at high risk of obsolescence. The collection has grown through the years to include examples of eBook mobile apps, web-based interactive narratives and the various contextual information and documentation that surrounds these publications. In 2023, the Digital Storytelling exhibition opened at the British Library to showcase and celebrate many of the emerging formats publications collected by the Library.