A fabled diamond, a 113-year-old artist with a gift for secret codes, a bucket of cold porridge and two Agaton Saxes? Even for the famous sleuth of Byköping, this is proving to be an unusual summer!

In a case that will take him from his sleepy hometown to the streets of London, via an unexpectedly upside-down helicopter, Agaton Sax will have his work cut out for him this time. And Aunt Matilda isn't happy about it at all...

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, for the first time, Oak Tree Books is proud to publish the entire Agaton Sax series in audio format, newly translated for the next generation and expertly narrated by Barnaby Eaton-Jones.