Munawar Ali Karim is an author, historian, and combatives instructor with over three decades of martial arts experience. Munawar lived in the Japanese countryside for several years studying Shorinji Kempo, and the way of ninjutsu, samurai and sufi masters. Later, he took up the study of Shaolin Kung Fu; Brazilian Jiu Jitsu; and Wing Chun. In his writing, coaching and personal practice he seeks to realise the maxim of Musashi Miyamoto: "Pen and Sword in Accord". Munawar Karim resides in Reading, Berkshire, England.

Loukas Kastrounis is a third-generation descendant of Grand Master Yip Man through Bruce Lee teacher Wong Shun Leung, and second-generation Kali instructor through Guru Dan Inosanto. For over three decades he has been teaching complete beginners and experienced martial artists of different styles, law enforcement officers, security firms and the military at home and overseas. His work has been featured in the British and international press and he is a Combat Magazine Hall of Famer. Sifu Loukas Kastrounis resides in Wokingham, Berkshire, England.