While declarer play and defense haven't changed that much in the past 30+ years, bidding has. And by learning to bid better, you will play better bridge and have more fun.
In a series of clearly written, easy-to-follow chapters, this book will help you go from "old style" bidding to modern bidding, thereby enabling you and your partner to get into the bidding more often, communicate better and wind up at better contracts.
If you'd rather be declarer than defender, the bidding tips in this book will certainly help. Plus, the chapter on tips for defense and declarer play will help improve those areas of your game as well.
This book will definitely help you upgrade your game and get on the same page as your partner.