Here are some free eBooks/resources on some of the most popular GRE topics!
A Complete Guide to the GRE: An introduction the GRE format, concepts, strategies, etc.
Attachment:
Magoosh GRE eBook.pdf [1.75 MiB]
Downloaded 3029 times
Vocabulary help:
Complete Guide to GRE Vocabulary: Themed word lists (also with definitions and example sentences).
Attachment:
Magoosh-GRE-Vocab-eBook.pdf [1.72 MiB]
Downloaded 2309 times
Math formulas:
GRE Math Formulas: A list of all of the math formulas you should review and memorize for the GRE Quant section.
Attachment:
Enjoy!