Walker, Matthew. Certified Ethical Hacker (CEH) Study Guide: In-Depth Guidance and Practice / Matt Walker. - Sebastopol, California : O'Reilly Media, 2025. - xx, 459 pages : illustrations ; 24 cm. Includes index. ISBN: 9781098174774 Subjects--Topical Terms: Electronic data processing personnel—Certification.Computer security—Examinations—Study guides.Penetration testing (Computer security)—Examinations—Study guides.Hackers—Examinations—Study guides.Computer networks—Examinations—Study guides. LC Class. No.: QA76.9 / A25 W35 2025 Dewey Class. No.: 005.8 / WAL 2025