The list of official ETS materials links the 2nd edition of the Practice Book, which is the most current. There's also a 1st ed:Practice Book for the Paper-Based GRE Revised General Test, 1st ed
The 1st ed uses the old 200 to 800 scoring scale, but it's otherwise fine to use as practice for the current GRE. You can convert the old scale to the new one using this concordance table: https://www.ets.org/s/gre/pdf/concordance_information.pdf
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