Kaplan confusion!

[dreamingaboutmedicine]

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Hi everyone!
I plan on taking the MCAT in March of 2019. I have been doing research trying to find out which set of older version Kaplan books would be sufficient to use.
I noticed Kaplan has the "2nd edition", "3rd edition", and then the "2017-2018" version.
Would this 2nd edition set be still useful for the new MCAT (says 2015) or should I go for the third edition?

 

[gp2]

I don't have experience with the 2nd edition books, but the 3rd and 4th edition seem to be closely related so I would suggest at least the 3rd edition so the content is more specific to what are on the more recent tests.