The book "In the middle of the exposition. Walks of two children on the Champ de Mar and the Esplanade des Invalides" by the author E. Lamarck is a bright and amazing tale about the adventures of two children who visit the World Exhibition of 1867 in Paris. During their walks, they will learn a lot about the various types of art, science and technology presented at the exhibition. The author helps young readers feel the atmosphere of the exhibition and discover a world of new knowledge and impressions. A beautifully illustrated book that encourages learning and exploration of the world around us.