The series of books about Mikołajek, written by René Goscinny and illustrated by Jean-Jacques Sempé, is a charming and humorous tale about the adventures of a little boy named Mikołajek. Set in France in the 1950s, the story focuses on Mikołajek's daily escapades and those of his friends.

Mikołajek is a lively and curious boy who often finds himself in amusing predicaments. His adventures are full of warmth and humor, making it easy for children to relate to him. The books feature many colorful characters, such as his best friends: Alcest, Joachim, Euzebiusz, Maksencjusz, and Ananiasz.

The "Mikołajek" series is perfect for children because it not only entertains but also teaches values such as friendship, loyalty, and dealing with everyday problems. It's a read that will surely delight young readers and make them eager to pick up the next volume of Mikołajek's adventures.