I recommend this short book on writing. The author, John Trimble, wrote it as a quick-to-read "survival guide" for students. Trimble does not go into great detail nor does he examine the different modes of discourse. Rather, he discusses ways to think about non-fiction writing in general. For this reason, the book might be best suited for someone who has some writing experience.
What I most like about this book is that Trimble focuses on thinking like a writer rather than on following set formulas for writing. In fact, in the introduction, he makes the point that most glaring problems in a paper come from faulty thinking or from not asking the right questions while writing.
In short chapters, the author discusses questions and problems the writer must confront in order to produce wriiting that holds atention while communicating something worth saying. He also walks the reader through parts of sample essays and discusses how the writer may have made the decisions he/ she made, and how he / she may have confronted various challenges.
Finally, Trimble also places an emphasis on composing concise, clear, interesting prose. He repeatedly reminds us that the reader is under no obligation to read what the writer produced. Just as we turn off the television show that does not grab our attention and hold it, we also put down writing that bores, seems incompetent or lazy, or that reads as though a committee composed the work.
Though this is a short book, one that can be read easily in three or four sittings, it is one that reminds us that writing is a form of communication rather than a formula in which someone simply fills in the variables. It reminds us that there is a reader we must take into account. And, most of all, it reminds us that successful writing takes careful thinking.