Luka is and ex-special forces member - an operator in ESD (Enota za Specialno Delovanje) in Slovenian Army.

You may know him as "the medic" from UF PRO series of videos.

An excellent book in which you take a tour through the selection for Slovenian Army special forces unit ESD (Enota za Specialno Delovanje), training, a couple of missions and a highly regarded SOCM (Special Operations Combat Medic) course that Luka completed in the US.