I'm not the kind of person who 'gets' statistics. That's why I found this book to be of great use to me when time was running out to complete my thesis. It explains how statistical analysis methods work in Layman's terms much better than the other books on the subject. It tells you WHY you should choose a certain test and it's pros and cons of each test in a clear way.
It doesn't explain how to implement the tests with statistical software packages, though. For that, you'd be better off with Calvin Dytham's "Choosing & Using Statistics: A Biologists Guide." I found that by using both books together, i.e. Fowler et al. for an understanding of each test, Dytham for how to conduct my test on my computer - gave me greater understanding of what I was doing.
Glad I bought it, I suggest you do the same.