Law in the Era of Artificial Intelligence indudes a collection of papers presented at the 35th Nordic Conference on Law and Information Technology. The Conference was held in Stockholm in November 2020 and had the title 'Law in the Era of Artificial lntelligence'. It examined the manner in which legal concepts, developed for a non-digital context, can continue to be applied in the era of artificial intelligence. The Nordic Yearbook of Law and Informatics 2020-2021 explores the above theme and is divided into four parts: data protection, transparency, liability and regulation. The Nordic Yearbook of Law and Informatics (Nordisk årsbok i rättsinformatik) was initiated by the Scandinavian institutes for Law and Informatics. It was first published in 1984 and during the initial period a yearbook was produced on an annual basis. From its inception, hundreds of artides have been published, reflecting developments in the Scandinavian context and internationally. The Swedish Law and Informatics Research lnstitute (IRI) is a research unit at the Faculty of Law, Stockholm University, and was founded in 1968. Having been instrumental in their establishment, IRI has had a long working relationship with The Swedish Society for IT and Law (Svenska föreningen för IT och juridik, SIJU) and The Foundation for Legal Information (Stiftelsen för rättsinformation), operating since 1988.