A hardcover (or hardback or hardbound) book is bound with rigid protective covers (typically of cardboard covered with cloth or heavy paper) and a stitched spine.
Hardcover books are much more durable than paperbacks, which have flexible, easily damaged paper covers and glued spines. Hardcover books are also more expensive to manufacture and purchase. Hardcover books frequently come with artistic dust jackets. The hardcover edition of a book is typically released earlier than any paperback editions.
Hardcoverbooks are often printed on acid-free paper, and are much more durable than paperbacks, which have flexible, easily damaged paper covers and glued spines.
This method of sale is used for a higher initial profit on the books, as hardcovers are, due to their apparently higher cost in materials, able to be understandably marked up more than paperback editions in the eyes of most consumers.
This makes hardcoverbooks a good example of price discrimination whereby the hardback version of a book is sold to those consumers with low elasticity of demandand the paperbacks sold to those with far greater elasticities whilst marginal costs to the publisher remain very similar.
For instance, a book with a cloth spine and corners and covers of paper-covered boards is termed Half-Cloth; a book with a leather spine and corners and cloth or paper-covered boards is termed Half-Leather.
HARDCOVER A book whose case is made of stiff boards, as opposed to wrappers.
Basically means that the book is in poor enough condition that whatever additional things you might find wrong with it that were not mentioned in the description are your tough luck and not a cause for return.