If you read the reviews of the first edition of this book (Survival Analysis Using SAS: A Practical Guide) you will see that everyone loved it. This edition is even better. The new edition is updated to cover a *LOT* of new functionality. There are new tests, new methods (especially noteworthy are the new Bayesian techniques), and a lot of new graphics. Things that used to be done with custom macros are now built into SAS and Allison covers them with the same clarity as people loved in the first edition.
To get a feel for the updates, the chapter on Kaplan-Meier methods is greatly expanded (don't worry if you don't know what that means he explains both the math and concepts beautifully). In the first edition he showed how to test for differences between three treatment groups but if there were differences in between the groups you could not test to see if group "a" differed from "b" or "b" from "c", etc., and adjust the p-values for multiple comparisons, this edition covers these critical tests (with adjustments for multiple comparison). There is also a lot of new material on graphics, like getting hazard function estimates with confidence intervals.
If you are a biomedical researcher, this book explains both the reasons why you will want to do a test and how to conduct it. Basically Allison makes SAS seem like the best choice for survival analysis.