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. However, Detective Marpòl is busy… Will Filippo be able to solve this mystery all by himself?

The volume, written by Enrico Marigonda and illustrated by me for publisher il Castoro, is part of the Tandem high readability series: first a small story to start, written in uppercase, followed by a larger story, in lowercase.