If you're looking for a downloadable PDF version of the book, I can suggest some possible sources:
Multivariable Calculus (6th Edition) by and David E. Penney is a widely recognized textbook used in undergraduate mathematics to bridge the gap between single-variable calculus and higher-dimensional analysis. This edition, published by Prentice Hall (now part of Pearson), is noted for integrating traditional calculus methods with modern computational technology. Key Features and Pedagogy If you're looking for a downloadable PDF version
Unless your professor assigns specific homework problems from the 8th or 9th edition, the for self-study. the for self-study.