Berts bravader (Swedish: Bert's exploits) is a diary novel, written by Anders Jacobsson and Sören Olsson and originally published in 1991. It tells the story of Bert Ljung from 2 January to 1 January during the calendar years he turns 14 and 15, covering the spring term in the 7th grade, the upcoming summer break, and the autumn term in the 8th grade.