Berts första betraktelser

Berts första betraktelser (Swedish: Bert's first contemplations) is a diary novel, written by Anders Jacobsson and Sören Olsson and originally published in 1990. It tells the story of Bert Ljung from 1 January to 30 April during the calendar year he turns 13. The book uses the 1989 almanac following the Gregorian Calendar. On 19 January, the book version mentions the year being 1989, but the cassette tape recording mentions no specific year at all. The book also mentions Åke as a "76:er". As standard, Bert opens the chapters with the words "Hej hej hallå dagboken!" and finishes with "Tack och hej – leverpastej". Bert writes diary for each day during this calendar year, and most notes depicts what happened yesterday.

Originally, the Berts betraktelser trilogy appeared in the radio program Almanackan during 1989, where one program was done each day during one year, which Sören thought was fitting well for a diary. For first time, Sonja Härdin illustrated the books.