Operasjon Tordensky

Operasjon Tordensky Operation Thundercloud

Detective Agency No. 2 #1

Who is behind the strange thefts in Riverton?

Nobody seems to see the connection between the strange events taking place in Riverton this summer: baker Monsen’s entire stock of yeast getting stolen, the new bathing platform barrels at the beach going missing, and someone making off with all the juniper berry bushes in the park. The list of stolen items just keeps on getting longer – not to mention more incomprehensible. The young detective duo Tiril and Oliver are hot on the case, but in desperate need of a clue to help point them in the right direction. It will take some genuine detective work and a clever, four-legged ally to solve this case of missing items!

Jørn Lier Horst & Hans Jørgen Sandnes’ Detective Agency No. 2 series is crime fiction for the youngest – clever, engaging, and full of thrills! Join our heroes Tiril, Oliver and their dog Ocho as they solve mysteries that have even the adults of Riverton scratching their heads.


  • “The new crime fiction series for kids engages from mystery one.”


    Østlands-Posten, Norway

  • “The books are easy to read, the mysteries are exciting and it’s all finished with colorful illustrations. /…/ I welcome more books in the series!”

    Oppland Arbeiderblad, Norway

  • “If you have a small detective or enjoy clever stories, then definitely don’t miss this book. It even entertained me, though I’m quite a few years older and not the target audience. /…/ Operation Thundercloud is just the sort of book that will amuse children as well as their parents and grandparents.”

    Severské detektivky, Czech Republic

Photo: Dag G. Nordsveen Jørn Lier Horst & Hans Jørgen Sandnes
  • Children’s crime fiction
Reading material

Norwegian edition

English translation

Rights sold

Estonia, Varrak

Finland, Otava

Hungary, Scolar

North Sami, Solum Bokvennen

Norway, Gyldendal

Poland, Media Rodzina

Romania, Editura Paralela 45

Slovakia, Premedia

Sweden, Bonnier Carlsen

More From Jørn Lier Horst & Hans Jørgen Sandnes

Detective Agency No. 2

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Children’s non-fiction