Citinauts

The book cover art was created first. Its most characteristic element is a signpost entirely festooned with arrows which emphasize the atmosphere of search throughout the book. 

A big-city scene showing spectacular, very tall townhouses. This is the first page of the story where we meet the characters and from which all the stories begin. It is worth paying attention to cats carrying a sheet of paper.

Collage of urban scenes inspired by the architecture of Warsaw, Krakow, Gdansk, and Szczecin. In the foreground, we can see typical Warsaw Old Town buildings, further Krakow's town square structures. The huge brick dominant is the St. Mary's Basilica in Gdańsk. Our characters are still in action: the cats are folding their paper, the hedgehog is giving an acorn to the squirrel. The gentleman with the flower is exchanging gifts with the composer and receives a vase.  A girl in a red dress is riding an elephant. 

Warsaw buildings floating among the clouds on green islands. The tower of the Poniatowski Bridge, the top of the tower of the church of St. Anna and the chapel of the church of The Holiest Savior can be found here. The boy and the penguin are talking to a giraffe. The gentleman with a flower is talking about plants with a smartphone.

A bustling life on the roofs of a fantastic 19th-century city. One of the Warsaw buildings included is, for example, a Wedel's house at the corner of Szpitalna and Górskiego Streets. A squirrel loses her acorn here! The composer is playing his compositions on the piano and the cats are still working on their piece of paper.

The work shows old Warsaw buildings on slender legs over green hills, in accordance with the idea of meadow cities. In the background typical, colorful townhouses of Polish towns can be seen, among which characteristic dominants of Torun and Lublin spring up. 
The squirrel is looking for her lost acorn which is right next to a landing man with a suitcase.
Meanwhile, a man with a drop is pouring water into the vase belonging to a gentleman with a flower.

Towers of Polish cities. Here we can find the dominants of cities such as Wrocław, Poznań, Gdańsk, Kraków, and Warsaw. The cats are finally soaring into the sky on their plane!

The final scene where the main characters set off towards the downing sun. The squirrel finds its acorn, the gentleman with a flower is handing flowers to the girls and the composer and the penguins are playing the piano Two distinctive objects from the past appear on the last page of the book.  High speed aerodynamic PM36 locomotive, awarded at the Technical Exhibition in Paris in 1937,  is going over the no longer existent Pancer viaduct in Warsaw. 

The watercolor on the back cover of the book is dominated by the tower of the Poniatowski Bridge, in the background, you can see the skyscrapers of the Warsaw center. Here we can find all the main characters appearing on the pages of the story.