Men are problem solvers. When a man encounters a problem with something that is of value to him, he will get whatever tools or resources necessary and do his best to fix what's broken or needs maintenance. If the problem is an unhappy wife, though his relationship with her is something he values, he may not know which tools or resources to use to tackle the problem. As a matter of fact, he cannot fix the problem until he understands the heart of his wife.
Wives actually do come with care instructions, but those instructions are written on their hearts. If a man is unable to interpret those instructions, he could end up with a very unhappy wife. Just as it takes a man to help a woman understand the heart of a man, it takes a woman to give a man the kind of insight that will help him to understand the heart of his wife.
This book gives a husband or a husband-to-be insight into what could make his wife unhappy, and places in his hands tools that will enable him to fix the problem or prevent it from happening so that he can confidently carry out the biblical mandate, cheer up your wife.