Is there a piece of thread-bound book?

Yes Thread-bound book refers to the form of binding pages into a book. The pages are usually arranged in the form of hinges and sewn on the spine. Thread-bound books include a book block and a book shell. Details are as follows:

1, book block refers to the part of a thread-bound book that contains pages, also known as "book body". The book block consists of several hinges, each of which includes two pages, and the pages are usually printed on both sides.

2. Book case refers to the shell of a thread-bound book, including the cover, back plate, spine and other parts. The book cover is usually made of paper or other materials, which is used to protect the book block and is convenient for readers to carry and use. So thread-bound books usually contain book blocks.