Bert writes diary for each day during this calendar year, and most notes depicts what happened yesterday.

When reaching the autumn stories, the writers tried to split up the storywriting, calling it "creative competition", trying to exceed each other with fun and surprise with something unexpected.

[2] The book cover shows Bert lying on his littered floor writing in his diary while eating popcorn, and listen to radio-tape recorder at high volume.

On the floor is a cassette tape, leverpastej, stockings and cards with girls (Ida, Nadja, Paulina and Emilia).

A heart symbol appears out of Bert's head, when he watches a photograph (turned to the other side, not revealing who the picture shows).

Bert and Åke also hear that in the USA and the USSR, mystic sounds from space have been reported, which might be extraterrestrials.

With problems to decide which girl to like, the starts to hang with the other guys in town on Friday and Saturday evening, ending in trouble with raggare.

Emilia stares at Bert during the PE lesson, and Bert feels like a new person runs around the gymnastics hall, and he thinks of going to Emilia and present himself, but feels it would be stupid as they've been classmates for six and a half years.

Inside a parish hall a group of young people play table tennis.

During a school canteen food fight, Lill-Erik ("Little Erik") is hit with food by Björna, and becomes "Stor-Erik" ("Erik the Great") and hits Björna, before Ida kisses him on his cheek and he becomes Lill-Erik again.

Bert feels guilty, and depicts the incident as bigger than a war being fought somewhere in the world, where over 400 people are suspected to have been killed.

As weeks pass, December comes, with Advent, Saint Lucy's Day, Christmas and New Year.

While the class celebrates the First of Advent, Bert watches Emilia in the candlelight, while Åke puts fire on his mathematics book protesting against his views on Christmas being "fascist hypocrisy", and he's forced to pay for a new one.

Åke soon says that the Earth is threatened by the "multiastronomiska fulingarna", extraterrestrials from the "inner galaxies" in the middle of the Universe, and they say "–Jolijapa", which he says is either a greeting, or a death threat, and Åke plans making a bomb, stealing chemicals from chemistry at school.

Bert's class also sings for their schoolteacher, but Åke eats up all 31 saffron buns and everyone tosses snowballs on him.

Bert's fathers brother, Janne, who lives in New York City in the USA, visits Sweden over the holidays.

Suddenly he fears the Earth being invaded by small green extraterrestrials from another planet, who would force him to marry a girl of their species instead.