Grendel is the fourth book in the series The Campaigns of Benedict Spinoza. And again, the wind of wanderings forces the crew of the Mammoth series supertank to leave the military unit. Darius and Tannhäuser, together with ancient mutant magicians, are called upon to deal with the mysterious radiation that has been escaping into space for many years from the planet Mozhai. It would seem that the Galaxy is almost immense, and it is impossible to accidentally meet friends on one of the distant planets. But the captain of the "Puzatik" Lince McNery succeeds. Long gone are the days when long-distance flights went without problems - now these problems rained down one after another. And investigator Sherlock Tumberg successfully conducts his next investigation and is already getting ready to go home - but then fate throws another twist... And very serious matters lie ahead - we are talking about a threat to the entire galactic community! The Campaigns of Benedict Spinoza: Breakthrough Mozhai Avalon Grendel Zigzags