This spreadsheet contributes to a new bibliography of censored books under the Portuguese Estado Novo dictatorial regime. It contains the transcription of the data fields of 1,015 card files of censored books, which are indexed by author surname in letters A and B. These files are available at the Arquivo Nacional da Torre do Tombo, in Lisbon, Portugal (PT/TT/SNI-DSC/7, "Fichas de Autores de Obras Proibidas e Autorizadas", https://digitarq.arquivos.pt/details?id=4326912). The card files document data about the books censored by the Estado Novo Censorship Commission (1934-74). Data fields include file number, book report number, decision, date, author, title, origin, destination, observations, notices, and author or book process number. All card files have been photographed from very poor-quality photocopies and manually transcribed by Álvaro Seiça during 2020/21. Letters C-Z are ongoing work and will be added to this dataset. This project received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement no. 793147, ARTDEL. More info at https://artdel.net