Spine of the case is covered in contrasting material to that of the boards

A book with its spine bound in a different material than the boards (e.g., a leather spine and cloth- or paper-covered boards).

An economical covering method in which one piece of good material (e.g. leather) is used to cover the spine, extending over part of the sides as well, and a cheaper one to cover the remainder.

A book with spine covered in a different material than boards (e.g.: the book might have a leather spine and paper-covered boards).

A book whose spine is covered in a different and generally higher quality material than the covers.

Similar to half binding but only the spine is covered in the specified material. The remaining board or cover is usually of a lesser material such as cloth or paper.