6 books • 7 series
Die Toten im Palazzo
Der Tote im Moor
Futureface (Adapted for Young Readers)
Hacking with Kali Linux (Penetration Testing Hacking Bible, #1)
Futureface
Hacking (Social Engineering Attacks, Techniques & Prevention, #1) (Hacking Firewalls & Bypassing Honeypots, #1) (17 Must Tools Every Hacker Should Have, #2) (Beginners Guide, #1) (5 Manuscripts) (2 Manuscripts)