Geis was the third collection by one of Ireland's most acclaimed younger poets, winner of the Irish Times Poetry Now Award 2016. It was also a Poetry Book Society Recommendation and was shortlisted for the 2016 Pigott Poetry Prize in association with Listowel Writers' Week.

'Geis' is a word from Irish mythology meaning a supernatural taboo or injunction on behaviour. In her long-awaited third collection, Caitríona O'Reilly examines the 'geis' in all of its psychological, emotional, and moral suggestiveness: exploring the prohibitions and compulsions under which we sometimes place ourselves, or find ourselves placed. In poems that range from the searingly personal to the more playfully abstract and philosophical, O'Reilly's characteristic imaginative range and linguistic verve are everywhere in evidence. These are poems that question our sometimes tenuous links with the world, with others, and even with ourselves, but which ultimately celebrate the richness of experience and the power of language to affirm it. Geis is Caitríona O'Reilly's third collection and a Poetry Book Society Recommendation. It won the Irish Times Poetry Now Award 2016, and was shortlisted for the Pigott Poetry Prize. It follows her critically acclaimed earlier books, The Nowhere Birds (2001), shortlisted for the Forward Prize for Best First Collection and winner of the Rooney Prize for Irish Literature, and The Sea Cabinet (2006), a Poetry Book Society Recommendation which was also shortlisted for the Irish Times Poetry Now Award.