The term "dos-à-dos" is also used to refer to a single volume in which two texts are bound together, with one text rotated 180° relative to the other, such that when one text runs head-to-tail, the other runs tail-to-head. However, this type of binding is properly termed tête-bêche (/tɛtˈbɛʃ/) (from the French meaning "head-to-toe", literally referring to a type of bed). Books bound in this way have no back cover, but instead have two front covers and a single spine with two titles. When a reader reaches the end of the text of one of the works, the next page is the (upside-down) last page of the other work. These volumes are also referred to as "upside-down books" or "reversible books".