I’m sorry to have to tell you about it this way. An online blurb hardly seems the place. But — Simon Bedrock, you know, the editor of The Pebble Gazette? Well, he believes that some mischievous pebble is sneaking into the offices and adding silly stories to his prestigious newspaper!

Obviously, such a heinous crime must be stopped. And Ellery Quartz, Pebble Investigator, seems to be the only pebble fit for the job.

Match wits with him — will you discover who the invisible author is before he does?