Mikhalkov, S. Uncle Stepa the Militiaman (Dyadya Styopa - militsioner), 1956. In Russian.

Сергей Михалков.
Дядя Степа — милиционер. / Рисунки Г. Мазурина. Серия: «Мои первые книжки».
Москва : Государственное издательство детской литературы Министерства просвещения РСФСР (Детгиз), 1956.
16 с. : ил. ; Обычный формат. Мягкая издательская обложка.
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Sergei Mikhalkov.
Uncle Stepa the Militiaman. / Drawings by G. Mazurin. Series: "My First Books".
Moscow : Detgiz (State Children's Literature Publishing House), 1956.
16 pp. : ill. ; Regular format. Original softcover. 

This 1956 edition of Sergei Mikhalkov’s Uncle Stepa the Militiaman marks a significant moment in the evolution of one of the most iconic characters in Soviet children's literature. While the original "Uncle Stepa" debuted in the 1930s, this sequel—published during the early Khrushchev Thaw—reintroduces the giant-statured hero as a benevolent guardian of public order. The text provides a deep dive into the internal logic of the post-war "ideal citizen," including the arrangement of various urban vignettes where Stepa uses his extraordinary height and kind heart to help children, regulate traffic, and solve community problems. This specific release in the "My First Books" series was designed to be the primary introductory text for young readers, emphasizing themes of bravery, service, and the human face of Soviet law enforcement.
The physical identity of the book is inseparable from the artwork of German Mazurin. This 1956 edition is one of the earliest to feature Mazurin’s definitive visualization of the character; his illustrations helped cement the tall, friendly, and disciplined image of Stepa that would endure for decades. The 16-page softcover, printed by Detgiz, utilized a vibrant yet accessible format intended for mass distribution among preschool and primary school children. For bibliophiles, collectors of Soviet classics, and historians of children's illustration, this 1956 Moscow imprint is a vital primary source, documenting the mid-century canonization of Uncle Stepa as a pillar of Soviet pedagogical culture.