This excellent book makes a wonderful reference book and is also fun to read cover to cover.
Do you ever wonder which you should use, E.G. or I.E.? I always thought they could be used interchangeably. Actually they can't. I.E. stands for "that is" or "in other words" while E.G. means "for example".
If you have any grammar questions but are afraid to ask, most likely you can find it in Grammar Girl's Quick and Dirty Tips. You can also look for tips on Mignon's website and she even has an open invitation for people to email her with questions.
I checked this book out from the library but I am going to purchase a copy to have on hand. This book is indispensable!
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