The Japanese electronics expert Yoko Tsuno is the heroine of this classic comic series by Roger Leloup. Together with her friends Vic and Knut, she boldly dives into every adventure. Not only does she rely on her quick thinking, but also on her karate training. In this collection, Yoko Tsuno encounters various mechanical beings and robots both on Earth and on other planets. To her surprise, some of them are more similar to us humans than Yoko would have thought possible. The 6th volume of the thematically edited complete edition includes the individual volumes 4 "Under High Voltage," 18 "The City of the Exiled," and 21 "Ethera.".