Well, it could be that in this 'I raised my husband wrong novel', the plot focuses on a wife who discovers that her husband has turned out differently from what she expected due to her actions or inactions during their relationship. It could be a story of self - reflection for her. For example, she might have pushed him too hard in one direction, like making him focus only on his career and ignoring his emotional needs. And now she has to deal with the fallout of that, like a distant or unhappy husband.
Since I don't know the exact novel, I can only guess. The main characters are likely the wife who believes she raised her husband wrong, and of course, the husband himself. There might also be other supporting characters like friends or family members who either contribute to the situation or help in resolving it.
Well, you could try doing things he likes together to strengthen the bond. Also, showing appreciation and support for him can go a long way. Sometimes, small gestures of love and care can make a big difference.
One way could be to have heart-to-heart conversations regularly, listen to his perspective, and work on resolving any conflicts together. Surprising him with small gestures of love and support might also make a difference.