On Writing Well by William Zinsser

This book owes a lot of its advice to the little book, Elements of Style by William Strunk and E.B. White. Zinsser advocates a clear style that keeps the reader--and human interest--in mind. While at times Zinsser's tone came across as over-bearing, and I'm not sure that I'd want to have dinner with him, I think much of his advice is solid. If you're looking for concrete rules, you might prefer Elements of Style, but if you want more general advice, this book should be helpful.