Every Saturday I’ll give you a couple of idioms to learn. An idiom is a saying or phrase whose meaning cannot be taken from the literal meanings of the words.
keep books: keep accounting records
Example:
If we don’t keep accurate books, we’ll have no idea where we can cut expenses to improve our bottom line.
face value: the official worth of an item; also, the apparent value of something
Example:
The silver quarter had a face value of twenty-five cents, but because of its silver content the dealer offered me four dollars for it.
When he said he was a diligent worker, I took his statement at face value.