A lot of strange things happen in Borgo Mistero! Fortunately, the great detective Marpòl and her son Filippo are here to solve these cases with intuition and cunning! The famous adventurer Grisilla has received a mysterious letter and needs help to discover who sent it. Detective Marpòl, however, is busy… Will Filippo be able to solve this mystery all by himself? “I casi di Borgo Mistero”, written by Enrico Marigonda and illustrated by me for Editrice il Castoro, is part of the highly readable Tandem series: a small story to begin with, written in capital letters, and a large story to continue, in capital letters tiny.