(This is abbreviated text from The Global Indie Author.) What’s in a Number? There are five parts to an ISBN, separated by either a hyphen or a space. Only the first three digits and the final check digit are of a fixed length; the remainder vary according to language, publisher identifier, and the number of ISBNs assigned to the block. The five parts of an ISBN are: • the current ISBN-13 prefix of “978”; • the group or country identifier; • the publisher identifier; • the title identifier; and • Read More …