Prep book recommendations?

Hey guys,

I’m planning to buy a prep book from Amazon and I’m currently looking at these prep books for the GRE as recommended by [Exam Cave]

  1. Manhattan Prep 5 lb. Book of GRE Practice Problems
  2. Kaplan GRE Prep Plus 2020
  3. Manhattan Prep Strategy Guides
  4. ETS’s The Official Guide to the GRE Revised General Test
  5. Barron’s Essential Words for the GRE

Has anyone had any experience with these books? Which one(s) should I get? Are there any free resources similar to these that are available online or in e-book form?

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