GMAT OG Verbal Review: should I buy 2019 if I have 2018?

Hi kyuhunl.

According to the description on Amazon, the 2019 OG for Verbal Review contains 300 questions of which 255 are the same as those in the 2018 OG for Verbal Review.

The online questions are the same as those in the book, just in an online format.

Generally the Kindle edition of the OG for Verbal Review costs around $8. You can use the Kindle edition and the online questions that accompany it even if you don't have a Kindle.

The Kindle edition of the 2019 OG for Verbal review is not out yet, but if you are still prepping in a few months and feel like spending $8 for 45 more verbal practice questions, you could check to see whether the Kindle edition has come out.