The isbn number is assigned by a different national agency for each country. The national agency for each country can be found at at the International ISBN Agency http://www.isbn-international.org
The International Standard Book Number (ISBN) is assigned by the publisher to each book when it is about to be published. There is an organization that assigns number groups to any publisher that applies. The number group is filled out with a specific number for each book that the publisher issues. There are 13 numbers in an ISBN (formerly there were 10).
The ISBN of The Number Devil is 0805062998.
The ISBN of Number of the Beast - comics - is 1401219993.
The ISBN of Number Ten - novel - is 9780140279412.
The ISBN of The Precipice is 9780312848767.
Unless your employer assigns you a unique ID number, that would be your social security number or, if in the case of alien/immigrant workers, the work number ICE assigns.
The ISBN of I Am Number Four is 0-061-96955-9.
One can look up books using an ISBN number using a website called Lookup by ISBN. One could also look up books by the ISBN number on Amazon or ISBN-check.
No one assigns the N-number. You get to request one. You can request one on the FAA website.
ISBN stands for International Standard Book Number. Video games are not eligible for an ISBN number.
The ISBN of Think of a Number is 978-0-307-58892-0.
You should use the ISBN number provided by the publisher of the book.