A. Khan ek experienced cybersecurity expert, trainer, aur author hain jo ethical hacking, penetration testing, aur secure architecture design mein maharat rakhte hain. Unki books English, Hindi, aur Hinglish teenon mein publish hoti hain jisse beginners aur professionals easily cybersecurity concepts samajh sakte hain. A. Khan ka focus practical knowledge aur real-world application par hota hai.