Help! I'm Trapped...

Help! I'm Trapped... is a series of 17 books written by Todd Strasser, published by Scholastic Press. With worldwide sales of over 10 million copies, the plots mainly center around a group of children and a machine that has the power to switch bodies.
The first of the series, Help! I'm Trapped in My Teacher's Body, was published in 1993.

Characters

Jake Sherman – The protagonist, who constantly switches bodies due to accidents or pure selfishness. Although lacking good integrity, he is shown to make the right choices when necessary.Josh Hopka – One of Jake's best friends. Mischievous and facetious, he always sticks by Jake's side.Andy Kent – Jake's other best friend. Shown to be bit scatterbrained. Like Josh, he hangs out with Jake whenever necessary.Jessica Sherman- Jake's older sister. Known to disapprove against using the DITS, she tries helping Jake whenever he's in trouble.