Since its publication in 1967, Bertram Huppert&s influential Endliche Gruppen I has remained a standard reference on group theory, with its clear, precise and complete exposition. The present volume makes this classic text available in English for the first time, updated with modern notation and notes. In addition to foundational material, the book contains the theory of permutation groups, linear groups, p -groups, nilpotent groups and solvable groups, as well as the transfer homomorphism and ordinary representation theory. All topics are fully developed and accessible to students with a basic knowledge of algebra. Its comprehensive coverage and inclusion of more advanced topics make this self-contained treatise an invaluable resource for graduate students and researchers.