“Timothy Mouse and Fred Hedgehog. The Paris Affair” by Dagmara Budzbon-Szymańska is part three of the adventures of two friends unmasking crooked art connoisseurs. Commissioned by superintendent John Smith, Timothy and Fred go to Paris, where they are tasked with solving the mystery of an unwelcome visitor frequenting the Musée d'Orsay. The protagonists are faced with quite a challenge, as the unknown perpetrator enters the museum unseen, stays for several hours, but does not steal any paintings. The mouse and the hedgehog, clearly mesmerised by impressionist painting, do their best to determine the identity of the new antagonist and the charges that they should press. The author of the illustrations is Joanna Gębal, who as usual presents the adventures of the little heroes as well as her own interpretations of works of art in a colourful, humorous way.