Verso (noun)

1. A left-hand page of a book or a work of art, typically one of a series of pages with print or illustrations on the right-hand page.
2. A page of text facing a title page, plate, illustration, or map.

Origin:

From latin verso meaning 'turned'.

Examples:

1. The verso of the book was filled with photographs and illustrations.
2. He flipped through the pages of the book until he found the verso he was looking for.
3. The back of the painting was covered with a label on the verso.
4. The title of the novel was written on the verso of the front cover.
5. The verso of the map showed detailed topographical information.