Who's Been Sleeping in My Grave? by R.L. Stine

A boy suspects his substitute teacher is hiding a sinister secret in this second book in the Ghosts of Fear Street series from the master of children’s horror, R.L. Stine—now with a reimagined look! Do you believe in ghosts? Don’t say no until you take a walk down Fear Street. Past the woods, where no birds sing. Past the lake, where something lurks beneath the water. Past the cemetery, where everyone is dying to meet you. Zack Pepper thinks there is something very wrong with his substitute teacher. She’s super creepy and seems far too interested in him. But no one else seems to notice anything amiss. Zack is going to have to uncover the truth on his own—but will investigating prove to be a deadly mistake?

Robert Lawrence Stine, known as R. L. Stine and Jovial Bob Stine, is an American writer. Stine, who is often called the "Stephen King of Children's literature," is the author of hundreds of horror fiction novels, including the books in the Goosebumps, Rotten School, Mostly Ghostly, The Nightmare Room, and Fear Street series. Some of his lesser-known works include a Space Cadets trilogy, two Hark gamebooks, a two-part novel The Beast and dozens of joke books.<sup>[1][1]</sup> [1]: http://en.wikipedia.org/wiki/R._L._Stine