Before a book is published by a regular publishing house, there is always an ISBN, that is, the CIP data nuclear font size. ISBN queries are divided into two types:

1, September 20, 20091September 3;

2.20 13 till now;

CIP nuclear font size: [year number+serial number] For example, the input format of CIP data nuclear font size (20 12) No.280296 of China Layout Library is: 20 12280296, and the initial year of this query is from September 2009 to September 20 13. If not, please refer to CIP data.

The publication of works has many uses, and the formal uses are inseparable from the book number, such as pricing sales and evaluating professional titles. If you lose the book number, you will lose your recognition. Perhaps many authors think that since ISBN is needed for publishing works, there is no need to apply for ISBN. The application number is simple to say, but in order to avoid falling into the trap, there are several points to pay attention to.

The application of trap ISBN is formal, but it is not recognized.

Trap 2: the ISBN applied for is the ISBN used. We need to know that ISBN is consistent with published information. If it is inconsistent, it is not a regular ISBN.