The best part of the book is the first chapter. Read how the author's thinking doubled his productivity at a job the first week and find ways to make yourself a more valuable (read: productive) employee. Do that an you’ll be on your way to being an indispensable employee.
The second chapter, the one that contains various ways to cut costs, is just okay. It deals with a lot of ways to cut expenses and other costs. While employers will no doubt find it valuable if you could cut their sewer bill or other “hard” expenses in half, the best way to add financial value to the company finding ways to do your job better, make the products or services better, find new customers, and help retain existing ones. The book does touch on these topics, but not as much as it should.