Here are a few more favorite writing books:
"The Writer's Guide to Crafting Stories for Children", by Nancy Lamb. This one's a winner, even if you don't write for children. It's comprehensive, up to the minute, and offers great examples.
"What's Your Story", by Marion Dane Bauer. It's for young people, but full of common sense ideas.
"The 38 Most Common Fiction Writing Mistakes" by Jack Bickham. Every writing book by Bickham is excellent; this one is a great check for issues.
I have to admit, I'm a sucker for a good writing book. I learn something every time I read a new one.
I was teaching grammar to my 9th graders today, and bemoaning the mistakes that seem to be cropping up more and more in magazines and newspapers - I like to think they're typos, but I fear that some of the copy editors in question are lax on grammar skills. Have any thoughts?