insider
n
person who, as a member of a group or an organization, is able to obtain information not available to others 内部的人; 知情人. insider `dealing (also in,sider `trading) buying or selling with the help of information known only by those connected with the business 内幕交易.
On the subject of reading, Francis Bacon, who lived at about the same time as shakespeare, wrote these words, Some books are to be tasted, others to be swallowed, and some few to be chewed and digested. This good advice shows how it is possible to read