Writing Tools: 55 Essential Strategies for Every Writer by Roy Peter Clark is a Kindle Daily Deal for $2.99, price matched at B&N, Kobo, and Apple. Since I can never remember the name, I call this “the sentence-writing book.” Whether you’re writing letters, memos, homework, articles, blog posts, or fiction, this book is filled with strategies to tweak your writing to be more effective at the sentence level. Clark explains at length why old writing chestnuts typically presented as “NEVER DO THIS THING” are indeed problematic when carelessly done but can be wielded to good effect with intent. Once you understand the effect of passive voice and adverbs and so forth, you can make an informed decision about whether that technique belongs in a sentence or needs to be eliminated with a rewrite.
I give paper copies to students, writers, and everyone else I know who has occasion to communicate via the written word. If you fall under any of those headings, I recommend grabbing this helpful guide digitally while it’s cheap.