Great doings with Mr. Boomschmidt's circus, interplanetary beings and certain animals of the baser sort complicate Freddy the Pig's life again for a delighted while. As in Freddy and the Space Ship (1953) there is the planetary problem here- this time brought to Earth in the form of ""Martians"" whom Mr. Garble, a fraud, palms off as a real money attraction for the circus. Dirt is done, but the goods are gotten too. To Freddy, the Martians begin to look increasingly familiar until he discovers they are rats in disguise and the case is split wide open when real Martians appear on the scene to help save the day. With the wit rolling off the pages, Mr. Brooks is still having fun spoofing people, situations and other spoofers.