It is a detective novel originally written in Swedish, and its publication in Spanish has been very well received by young readers. It is the first in a series of three. Kalle Blomkvist is a thirteen-year-old boy with an unusual passion: he wants to become a professional detective. He loves comparing himself to great crime minds like Hercule Poirot, and he spends long hours lying under the pear tree in his garden, imagining complex criminology theories with an imaginary interlocutor.
During the summer holidays in his quiet village, Blomkvist becomes involved in strange events when he discovers that something unsettling lies beneath the town’s apparent calm.
Accompanied by his inseparable friends Anders and Eva-Lotta, he embarks on an investigation full of mystery, tension, and real danger. What begins as a youthful pastime takes on a more serious tone. Kalle faces not only puzzles but also an adult world that tends to underestimate his intelligence and determination.
What makes this novel special is how Astrid Lindgren combines youthful curiosity with a solid detective plot: it is not merely a game, but a genuine exercise of wit and courage.
Additionally, the setting is very evocative: a Swedish summer, a small village, friendship, loyalty, risk, but without falling into melodrama. It invites reflection on justice and responsibility.