How many self-publishers in India opt for ISBN when their book is published? While exact data on this is not available, one can safely assume that it is not flattering by any count. ISBN or International Standard Book Number is a 13-digit unique, numerical code that is assigned to a book to identify it. Every new version of a book gets separate ISBN codes. For any new … [Read more...] about What You Need to Know about ISBNs If You Are New to Self-Publishing