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8th Nov 2015, 2:08 PM
	TopPopper Member since Mar 2013 2612 Points	No need, I just did some checking and found this on good old Wikipedia: "The initial ISBN configuration of recognition was generated in 1967 based upon the 9-digit Standard Book Numbering (SBN) created in 1966. The 10-digit ISBN format was developed by the International Organization for Standardization (ISO) and was published in 1970 as international standard ISO 2108 (the SBN code can be converted to a ten digit ISBN by prefixing it with a zero)." and "An SBN may be converted to an ISBN by prefixing the digit "0". For example, the second edition of Mr. J. G Reeder Returns published by Hodder in 1965 has "SBN 340 01381 8" - 340 indicating the publisher, 01381 their serial number, and 8 being the check digit, this can be converted to ISBN 0-340-01381-8, the check digit does not need to be re-calculated." So, 9-digit numbers do exist and can be converted to 10 digits. In your case, putting a zero at the front creates the number 0044134254. Google doesn't find it, but that's all you need to do, I think.

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