Matéria Prima will have a space dedicated to publications and multiples, available for purchase during the nine days of the Ephemeral Gardens. Author editions, books, records and art pieces, are present in the X edition of the JE for the complementary proposals resulting from the challenge launched to this already assiduous organization of the festival. Matéria Prima is a small-scale structure in Porto and is dedicated to selling books, records, magazines and zines, curating musical events and exhibitions.