Bert och badbrudarna (Swedish: Bert and the bath chicks) is a diary novel, written by Anders Jacobsson and Sören Olsson and originally published in 1993. It tells the story of Bert Ljung from 5 June to 23 August during the calendar year he turns 15 during the summer break between the 8th and 9th grade at school in Sweden. The book uses the 1992 almanac following the Gregorian calendar, but no specific year is mentioned. Just like Berts bekännelser, the book uses chapter names as well as dates. It was directly written for a 1992 summertime radio program.