Knock on Wood is a novella written by Cathy East Dubowski. It was first published in 2000 and was the thirty-fourth book in the Sabrina the Teenage Witch book series.
Description[]
Sabrina is having a very bad day -- she's found herself in hot water with Mr. Kraft, The Witch's Council, and even Harvey.
Frustrated beyond belief, she plops down on the bed and puts on her favorite movie, exclaiming "I wish I'd never been born" But, unbeknownst to Sabrina, Roland happens to be present, and must grant her wish....