KC discovers that the President of the United States has been replaced by a clone and sets out with her friend Marshall on a dangerous mission to set things right.

Jack is a walking fossil. The only human among a sea of clones. It s been hundreds of years since humanity died off in the slow plague, leaving the clones behind to carry on human existence. Over time they ve perfected their genes, moving further away from the imperfections of humanity. But if they really are perfect, why did they create Jack?

"A group of kids discovers they were cloned from the DNA of some of the greatest criminal masterminds in history for a sociological experiment, and they must find a way to prove it to the rest of the world"--

"Pegasus and Emily investigate a series of incidents back on Earth, and discover that the CRU has been cloning Olympians"--

In the first of two stories, zombie goldfish Frankie is good at saving the day, but the medieval day reenactment joust may be too much, and in the second story, Tom's evil brother clones a Jurassic carp, putting the school in danger.

Andy and Terry live in a 156-story treehouse. (It used to be a 143-story treehouse, but they added 13 more levels.) It has a wishing well, a super-stinky stuff level, a bouldering alley (it's just like bowling, except you use boulders instead of balls), an enigma engine, a TV quiz show level hosted by Quizzy the quizzical robot, and the amazing mind-reading sandwich-making machine that knows exactly what sort of sandwich you want and makes it for...