Martinović and Stričević (2011) characterize the picture book as the richest record of a child's early age. They expand the basic definition according to the wide range of materials from which it is made and various functions, and as such they define it as the first structured reading material intended for children. In addition, the picture books contain a simple text that young children can easily understand. The picture books are the first children's textbook. They must not burden children with unnecessary and superfluous details or distract them from the unimportant. Also, they must not close the space for free associations. Therefore, the effect of a picture book is greater if it is not highly ornate and if it is simple. In order for a picture book to flourish and succeed, it must primarily be fun and interesting to the child's eye. As picture books have developed throughout history, there has been a change in today's knowledge compared to those in the distant past, and at the same time the attitude and understanding of various topics has changed. They broadened their horizons and deepened themes, improved illustrations and introduced new material for making picture books. Despite the changes and deviations, the most common themes are feelings, animals, the alphabet and others. The authors of picture books are their world in which various situations and circumstances take place, which leads them to write a picture book. As a result, various themes of picture books are created that can arouse emotions in children that are important for their development and awareness of what is happening in the environment. Picture book themes are often life situations that a child or adult comes up with. This paper compares six picture books whose content is characterized by love, togetherness and friendship. The auditory sensitivity of the newborn is at a high level, which indicates that reading to the child is a key factor for the development of speech and reading. Reading as an activity is important for a child's cognitive, emotional and social development. Reading creates the child's identity and introduces the positive and negative characteristics of the characters, encourages critical thinking, strengthens auditory and visual perception.