A great number of antique books are bound in leathers calf, sheep and goat (Morocco leathers), being the most common. Books covered in these materials come in varying states of repair. The most common places of the book that need repair are the hinges where the board or cover of the book meets the spine.

The corners of the covers also need repair frequently as these two areas take most of the wear of the book. These are repaired using leather of the same type and of similar colour, once the repairs have been made they are stained and molded to ensure the finished job to be as close to original with very little detection of repair.

The extent of the damage to the original cover determines the extensive repairs needed to bring the whole book into its original and sale-able condition. Because of the large variety of leathers and the condition of the leathers for repair each book has to be treated as an individual and the repairs throughout approached accordingly.