I've just written a book, with my preferred solutions to every PS practice question in OG2018. I have a Master's Degree in Economics, two decades of private tutoring experience, and a 760 score on the GMAT, so I'm able to come up with my own solutions. Of course, like everybody else, I'm influenced by books and other articles, but I also have my own independent ideas and style. I hope that seeing all these solutions through the eyes of the same experienced test taker, problem solver, and tutor may help you strengthen your GMAT skills.

If you like my book or at least find some helpful solutions in it, then thank me please with kudos. I'm working on a sequel to it, with solutions to DS questions.

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My book:
Zoltan's solutions to every PS in OG2018