This French-language pocket guide focuses on rats, mice, and related small rodents. It presents the animals in an accessible reference style, with attention to their physical traits, varieties, habits, and the basic needs associated with keeping them. The book is best understood as a practical natural-history and pet-care resource rather than a narrative work, aimed at readers who want concise information about these often-overlooked small mammals. Its compact format suggests a guide intended for quick consultation, useful for prospective owners, hobbyists, or anyone seeking a straightforward introduction to the care and characteristics of rats and mice. The emphasis is on clear identification and responsible care, with enough context to distinguish common varieties and explain their appeal as small companion animals.