This is one of the books considered by SciFi fans a “Must read”.
Good the idea and the first part of the story. Honestly, I did not understand the end.
The idea is veryveryvery nice: the Aliens simultaneously land on Earth in six different zones, mess the inhabitants a bit up, than fly away. But leaving something in these zones, tricks and traps, appealing objects and deadly ghosts to guard them against the human greed. Very nice idea, but the end sucks.
nota per i lettori italiani: pubblicato da Urania col titolo "Picnic sul ciglio della strada"...Continua