Have you ever backed up your address book on your mac?
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Try this, Open your finder and go to /Users/yourusername/Library/Application Support/Address Book and let me know if you have anything called AddressBook.data or address book old.
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Which did you find, Address book or address book old?
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First I want to apologise I did not get back to you sooner Our power was out for almost 10hrs last night.
Can you quit address book and then move adressbook.data to the desktop and then rename addressbook.data.previous to addressbook.data then restart your mac and try opening the adress book program.
Let us know what happens.