Thanks to Agaton Sax's incredible investigation abilities, a plot to poison Scotland Yard's Inspector Lispington is foiled and an attack on the detective's own home ends up with the capture of two crooked criminals. But where did the criminals come from? What were they looking for? And what could possibly drive them to sabotage Lispington's muffins? Unable to turn a blind eye to the crimes committed, Sweden's finest detective sets out to follow the clues the criminals have left behind, unravelling the mystery that's been thrust upon him...The Agaton Sax series of books were first published in Sweden, later being translated into English and printed with illustrations by much-loved artist Quentin Blake (perhaps best known for his work on the books of Roald Dahl). The English translations became immensely popular, achieving the status of the most re-issued mystery & detective series in the history of Nordic children's literature.Now, after many years out of print, Oak Tree Books is proud to publish the entire Agaton Sax series, newly translated and illustrated for the next generation. This new collection includes the eleventh book which has never before been released in English.