An image from the cover of Matthew Kelly's new book, "Resisting Happiness."

In his latest book, Catholic author Matthew Kelly explores why people cannot be satisfied in today's world. "Resisting Happiness" takes a look at the choice people make to not do what they should, things that will bring them inner peace.

Kelly said that he is happy writing, taking morning walks and praying, yet finds things that seem more important that delay him from doing what makes him happy. He calls this "resistance," that thing that distracts us from doing what we know we should be doing. Fighting resistance is a daily battle.

The main point Kelly tries to make is that we are unhappy because we are not doing what God wants us to do. He points to Adam and Eve eating from the Tree of Knowledge, Lot's wife looking back on Sodom and Gomorrah, the Israelites rebelling. They all paid a price for disobeying God's will.

He shifts gears after the first couple chapters to talk about the idea of being the "best version of yourself." Through prayer and fasting, we will be living the lives God wants us to, which in turn will make us happy.

Kelly shares how a friend of his encouraged him to read the Bible, attend daily Mass, and pray for others in order to be a better version of himself. This has enriched his life, and he encourages others to do the same.

Kelly encourages prayer for 10 minutes a day and a daily reading of the Bible, saying people who read the Bible make better decisions because they understand God's mind better.

"The more ingrained this habit becomes in our lives, the clearer we hear the voice of God. The clearer we hear the voice of God in our lives, the more likely we are to walk in his ways, honor his will, and experience the peace and happiness he yearns to fill us with," Kelly writes.

The book offers nothing profound, but does lay out a simple plan for people to enter into a more prayerful life. Key points and action steps end each chapter to give the reader a quick reminder of what they should be doing. With Christmas coming up, this book would make a nice present for young adults trying to cope with the pressures of work and family, while trying to maintain their faith.