The Origin of Expressions: Have you ever wondered

Finally, an answer to the questions of what do these expressions or idioms used in everyday conversations really mean. For example, when someone says, “knock on wood,” do you know when and where that expression originated? If not, you are not alone.
The Origin of Expressions is a book that will answer many of these questions as it is packed with interesting facts and humorous stories that make for an interesting and entertaining read.