With the disappearance of Tyco Bass, David and Chuck have started the society for young astronomers as Mr. Bass wished. They decide to have Dr. Frobisher as a speaker, but his secretary, Horatio Q. Peabody, is jealous and goes instead. Meanwhile, Mr. Theo Bass comes to visit David and Chuck, and he wants to go to Basidium. In the preparations, Horatio figures out their plans and stows away on the spaceship. David and Chuck’s nightmares come true, as a scientist is loose on the Mushroom Planet!
The second book is as good as the first. Lots of excitement, and it’s fun, too. Of course, everything comes out right in the end.