Mars and Venus in the Workplace: A Practical Guide for Improving Communication and Getting Results at Work Book

In the introduction John Gray says to take the pieces that you find useful, and leave the rest. In that case this book was like reading horoscopes - there is enough that reads true to think he's very insightful, but 80-90% can be dismissed.

The part I found particularly disturbing was the specific advice for women to communicate like men. Studies show women are punished for perceived stereotype threat when they communicate like men. There was inadequate research for many of the suggestions in this book especially with providing advice to women for negotiating and communicating. Overall I found a lot of what he said quite out dated and no longer (maybe ever) observably true in today's workforce.

If you are a woman looking for advice read Harvard Business Review articles or Lean In by Sheryl Sandberg. Her book and suggestions are all backed by evidence.