What is ISBN?
The International Standard Book Number (ISBN) is the 13-digit number on the back of a book is an integral of part of any book nowadays. This number identifies the publisher and the book title. Booksellers, distributors and libraries use this number to order, price and keep track of inventory. ISBN is known throughout the world as a short and clear machine-readable identification number, which marks any book unmistakably. Today all major libraries accept only those books that carry ISBN. Click here to see an example ISBN bar code.