ISBNs on vintage books?

Wordwrestler

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Hi all. I was given a box of vintage books recently and suspect some may be valuable. I am having a hard time determining when they were printed & which printing they are, because I can't locate the ISBN. Any suggestions?
 

alleycat

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The ISBN has only been around since the 1960s.

You might try looking up the books on the Library of Congress website.
 

Wordwrestler

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Thanks, Alleycat. So basically all I have to use to figure out how old these books are is the design/ cover?
 

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Copyright.

Chances are, honestly, that they won't be very valuable. Things to look for:

Pulp novels with lurid covers in good condition
Genre novels by early names like Hammett in good condition that are vf and firsts
Ace Doubles
 
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Wordwrestler

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Thanks, medievalist. I have found the copyright, but for a few of the titles, there are 2 different versions. Some obviously newer editions than the others. For example one with a copyright of 1932 is made to match another in the series from 1952, while a much older-looking version of the 1932 copyright title is in the box too.

Hope that makes sense.
 

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Sometimes that's a sign of a bookclub edition. You might try looking for the books on ABE, for instance.

A couple people have asked what Ace Doubles are; they were early genre paperbacks from Ace, mostly SF and mystery, that had too short novels with two different covers in the same book.

http://en.wikipedia.org/wiki/List_of_Ace_double_novels