Hi simonden4,
Geometry is a rather 'contained' subject on the GMAT - meaning that there aren't that many formulas/rules/patterns that you need to know to properly deal with the relatively small number of Geometry-centric questions you'll see on Test Day. Thus, to answer your immediate question is probably 'Yes' - that book will probably teach you all of those formulas, rules and patterns. Knowledge is only part of what's needed to score at a high level on the GMAT though. Your ability to think strategically, stay organized with your work, make efficient decisions, etc. all also play a significant role in how you will score on Test Day.
Before I can offer you any additional advice for your studies, it would help if you could provide a bit more information on how you've been studying and your goals:
Studies:
1) How long have you studied? How many hours do you typically study each week?
2) What study materials have you used so far?
3) On what dates did you take EACH of your CATs/mocks and how did you score on EACH (including the Quant and Verbal Scaled Scores for EACH)?
Goals:
4) What is your overall goal score?
5) When are you planning to take the GMAT?
6) When are you planning to apply to Business School and what Schools are you planning to apply to?
GMAT assassins aren't born, they're made,
Rich