HBR Guide to Better Business Writing by Bryan A Garner

DON'T LET YOUR WRITING HOLD YOU BACK.
When you're fumbling for words and pressed for time, you might be tempted to dismiss good business writing as a luxury. But it's a skill you must cultivate to succeed: You'll lose time, money, and influence if your e-mails, proposals, and other important documents fail to win people over.
The HBR Guide to Better Business Writing, by writing expert Bryan A. Garner, gives you the tools you need to express your ideas clearly and persuasively so clients, colleagues, stakeholders, and partners will get behind them. This book will help you:

Push past writer's block

Grab—and keep—readers' attention

Earn credibility with tough audiences

Trim the fat from your writing

Strike the right tone

Brush up on grammar, punctuation, and usage