The book "Selected works with notes on the evolution of the mental in animals according to Romanes and the psalm of Montreal" by Samuel Butler is a study on the topic of mental evolution in animals, based on selected previous works of the author. In the book, the author expresses his thoughts and observations regarding important aspects of the evolution of thinking in animals, paying special attention to the research of Romanes. In addition, the book contains a poetic work that the author dedicated to Montreal, which reflects his impressions and feelings about this city. "Selected works with notes on the evolution of the mental in animals according to Romanes and the psalm of Montreal" is an interesting and detailed book that offers the reader a deeper understanding of the processes of development of thinking in animals and opens new horizons in this area.