cook the books实际含义是:to change numbers dishonestly in the accounts (= financial records) of an organization, especially in order to steal money from it
不诚实地更改一个组织的账目(如财务记录)上的数字,尤指为了偷钱
简言之,(尤指为了偷钱而)篡改账目。
book如果作单数,那是“书”的意思,而作为复数books,有“
the written records of money that a business has spent orreceived
(公司、商行的)账册,账簿”的意思。