TITLE: Math GRE: Calculus Textbooks - is Spivak + Stewart + Rudin sufficient?
QUESTION [5 upvotes]: Recently, I splurged and spent $1000 in math textbooks in preparation for the Mathematics GRE subject test. So far, in terms of calculus books, I have purchased Spivak, Stewart, and Baby Rudin. 
Is this sufficient preparation for the Math GRE or do I need to get my hands on Apostol?
FYI: I am extremely familiar with the univariate calculus and real analysis material. Multivariate, not so much.

REPLY [4 votes]: Stewart's Calculus will prepare you for the calculus questions in the GRE, while Rudin's Principles of Mathematical Analysis will prepare you for the introductory real analysis questions in it.