I recommend this kindle book: http://www.amazon.com/Smart-Students-Guide-Literature-English-ebook/dp/B008FWO6MS/ref=sr_1_4?ie=UTF8&qid=1405179484&sr=8-4&keywords=gre+literature
Having taken the test before, I was surprised by how many questions dealt with close reading. Cramming Vade Mecum into my head didn't help that much when almost every other question didn't seem to care about identification. Rather, many questions asked comprehension and close reading inquiries such as, "What would the author most likely think about _____," or "What is the tone of this passage?"
While it's good to read all of the classics, to prepare for the exam, only read a chapter of each, and focus on close reading daily.