Fourth in a series of Scholastic novelizations based upon the TV series Malcolm in the Middle. It's written in the first person with Malcolm as narrator, and captures the character's voice fairly well. This is intriguing because as an original story it's not based on any existing TV episode. Malcolm's family have a Krelboyne exchange student to stay for a week. 'Her name is Camellia. She's the same age as Malcolm, and every bit as smart. She's as tough as Reese, as cute as Dewey - everyone likes her... Mom and Dad are ecstatic, she's like the daughter they always wanted.' The boys resent her arrival immediately because Lois gives Camellia exclusive use of their room and they are forced to sleep on the couch. Graphic chaos soon descends on the family when the boys misbehave big time, Mother's Day looms, and Francis smuggles incriminating evidence out of Marlin Academy. Camellia quickly learns how to take advantage of everyone and every situation. Malcolm feels his genius status threatened and that his place in the family is being taken over by Camellia. Things go from bad to worse, but along the way, the boys learn a lot about Camellia, and in doing so, they learn a lot about themselves. The book is a bit hard to get into at first, perhaps because the boys are relentlessly unpleasant even compared to the TV episodes, and the writers sometimes forego originality and quote incidents from the TV episodes to set up original scenes. But the writing and story do get much better in later chapters, making it ultimately a more satisfactory read, and making this reviewer wish it had been an actual TV episode.