Display apparatus

A display apparatus comprising:

• a processor, configured to:
• acquire page information indicative of a page of a reference destination of a book;
• recognize page information indicative of an open page of the book;
• and
• perform control such that an image indicative of the page of the reference destination is superimposedly displayed on the book which is seen through a camera provided in the display apparatus that is mounted on a user in a case where the recognized page information is different from the acquired page information.

A display apparatus comprising:

• a processor, configured to:
• receive information which is displayed on a display screen of another apparatus;
• acquire page information indicative of a page, which corresponds to the received information, of a reference destination of a book;
• specify a location, which corresponds to the acquired page information, on a fore edge of the book;
• and
• perform control such that an image indicative of the specified location on the fore edge is superimposedly displayed on the fore edge which is seen through a camera provided in the display apparatus that is mounted on a user.