The Whodunit Detective Agency (also known as JerryMaya's Detective Agency, Swedish: LasseMajas detektivbyrå – "LasseMaja's Detective Agency") is a Swedish children's book series written by Martin Widmark and illustrated by Helena Willis. In the English translation, it is called "The JerryMaya detective agency". Between 2014 and 2016 eight of the books were published in English by Grosset and Dunlap, an imprint of Penguin Random House. Besides the books there are games, puzzles, etc. A television series based on the books has been produced in Sweden. Source: Wikipedia (en)