EAN-139781937994709   EAN-13 barcode 9781937994709
Product NameWho's Who of Doctor Who: A Whovian's Guide to Friends, Foes, Villains, Monsters, and Companions to the Good Doctor
CategoryBook / Magazine / Publication
Short DescriptionHeight:0 inches / Length:0 inches / Weight:0 pounds / Width:0 inches
Amazon.comA Buy on Amazon ~ 1937994708
Price New1.60 US Dollars    (curriencies)
Price Used0.98 US Dollars    (curriencies)
Width0.63 inches    (convert)
Height10 inches    (convert)
Length8.5 inches    (convert)
Weight32.16 ounces    (convert)
AuthorCameron K. McEwan
Page Count240
FeaturesUsed Book in Good Condition
Long Description

The Who's Who of Doctor Who is the must-have handbook exploring the dynamic cast of characters in Doctor Who over the past half century. Discover details about the intimate relationships between the characters, their loyalties, their betrayals, and of course how they collide with the good Doctor through time. With over 300 entries from companions and friends to aliens and villains, and loaded with photos from fifty years of Doctor Who, readers can learn about the Weeping Angels, River Song, the Master, and of course the dreaded Daleks. With text from Cameron K. McEwan, the creator of Blogtor Who and featuring artwork from the popular Doctor Who illustrator, Andrew Skilleter, this is essential reading for all Whovians.

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Created07-01-2013 2:49:30am
Modified07-20-2016 4:29:44pm
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Article of interest

ISBN stands for International Standard Book Number. Originally this was a 10 digit number known as ISBN-10, but has been replaced with a 13 digit version known as ISBN-13 (aka EAN-13) to better fit in with the industry standard product numbering system.

The ISBN system offers a unique numbering system for books and publications of various types. ISBN offers 9 identification digits for each book or publication and one check digit. ISBN-13 expands the available number set by doubling the available numbers. You might think that the extra three digits would more than double the available numbers but ISBN is limited within the EAN-13 numbering system and will always start with 978 or 979 as the first three digits, leaving only 9 more digits for the actual identification digits and again the last digit is the check digit.

Any ISBN-10 number can be converted to ISBN-13. Any ISBN-13 number that starts with 978 can be converted back to ISBN-10. ISBN-13 numbers that start with 979 cannot be converted to ISBN-10.

The conversion process from ISBN-10 to ISBN-13 is a rather simple one. Start with the first 9 digits of the ISBN-10 number, place 978 in front and calculate the new check digit using the standard EAN check digit calculation.

If you want to calculate the check digit for ISBN-10, that is done using a MOD-11 calculation that is very different than the EAN check digit process.


Look at the number above and below the barcode. You will see that except for the last digit in the ISBN number, all of the digits exist in the 13 digit version shown under the barcode right after the 978 and just before the new check digit of 5.

Now you can see how easy it is to convert between ISBN-10 and ISBN-13.