backjacket
nounUK /ˈbækˌdʒækɪt/
US /ˈbækˌdʒækɪt/
The back cover of a book that often tells what the book is about.
She read the backjacket to decide if she wanted to buy the novel.
OTHER MEANINGS
2. A removable paper cover wrapped around the back of a hardcover book.
The backjacket was torn after years of use.
3. The rear outer part of a jacket or coat.
He patched the backjacket of his old work coat.
4. A protective sleeve or wrapper on the back of a document or folder.
The backjacket of the report held the extra charts.