The "OG" is The Official Guide to the GRE, written by ETS themselves! :)
You can read more about it on our blog post here: Best GRE Prep Books 2021-2022
What is the OG?
The "OG" is The Official Guide to the GRE, written by ETS themselves! :)
You can read more about it on our blog post here: Best GRE Prep Books 2021-2022
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