is there a difference between destroyer 2008 and 2009?

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YES!!! The order/alignment of the questions are different, e.g. the author added new questions randomly and didn't start from where the author end, 2008 version.

Biol, GChem, and OChem had added new questions randomly, but math remains the same!!!
 
Although the math may be the same in the DAT destroyer, there is now a new book by the same author just for math called math destroyer
 
Interestingly enough I have a similar question. I know someone locally that is selling dat destroyer from august 2008 for $70. Would it be worth it to buy the latest version for the extra $100?
 
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