Ambrósíus saga og Rósamunda is a post-medieval Icelandic romance which belongs to a group of Scandinavian narratives utilizing the pound of flesh motif. It survives in 19 paper manuscripts from the 18th and 19th centuries, and it has never before been edited. The aim of the present edition is of an introductory nature, primarily to make the saga available to a wider audience, but also to encourage further research on both the saga’s transmission history and its intriguing mixture of literary motifs. The first part of the article contains a general introduction to the narrative, followed by a list of known witnesses and a brief description of its transmission in selected manuscripts. The second part of the article is a semi-diplomatic edition which presents the text of one of the earliest witnesses of the saga, London, British Library MS Add. 24 969.