Of course the first problem with this is that doing something ‘good’ cannot be defined within the human mind (Jeremiah 17:9).
Perhaps the reason that Harry Potter is so enticing is because people are bored with the idea that life does not matter. The prevailing idea taught by the secular culture today is that we have no purpose other than to live and die, so live as selfish as you can because you only live once.
Not only is that a lie, but it makes for a very boring life. It has no risk and no reward. It has no room for love, and if love does not exist then we are already dead. It cannot fill the hole in our soul that we were created with. This false idea of the secular culture will never be able to fill our curiosity to know our creator.
Nothing can hide the reality of our creator and our desire to want to understand him, for two reasons. First because he put the ability to understand when we are against him in our hearts (“I will put my law in their inward parts” – Jeremiah 31:33) and second he is endlessly fascinating (Ecclesiastes 5:7).
Not only are we created to get to know God, but we cannot survive without him (“man cannot live by bread alone” – Matt. 4:4) because he is the only sustainable being in the universe (“heaven and earth will pass away, but my word will remain” – Matt. 24:35).
Unless God is an active part of our lives, we will never be content and never find rest (“But the wicked are like the tossing sea, which cannot rest” - Isaiah 57:20).
The stories of Harry Potter are a glimpse of the spiritual world and their popularity is evidence to the fact that we are created with the desire to be part of the spiritual world.
The Real Story
The real story started before the creation of the world, with the one and only God, in which we became part of when he created us.
The bible is full of stories of how real people overcome the challenges of life and the enemies of God. Like the story about Noah and the ark, and Mosses and the Red Sea, and how David became King. Then came the story of how Jesus left heaven (John 1:14) to become a man and later gave his life as a ransom for all men who believe in him (Matt. 20:28), and how the gospel would be preached to the entire world before he would return.
These are real stories of real people living out part of history in constant contact with God as he directed their path (Proverbs 19:21) and strengthened their character along the way. These are the real adventures of the past and the present, in which the power of God was very much a part of.
The Real Adventure
The real adventure begins when you realizing who he is (“Turn to me and be saved, all you ends of the earth; for I am God, and there is no other.” - Isaiah 45:22), and who you are (Galatians 3:26), and what you have been trusted to do (“go into all the world”- Mark 16:15) and how critical your mission is (“the harvest is great, but the workers are few” – Luke 10:2).
So if you want to live an adventurous life then become a Christian, transform your mind and put your life in his hands (Matt. 10:39). There is a good chance that you will face unmatchable human opposition as Christ did, but these circumstances make opportunities to build your faith as God's intervention becomes your story. It is these experiences that make life a true adventure, in which your stories become testimonies of His power.
Besides there is no other purpose to fulfill. There is no other adventure to live because there is no other God and no other reward giver. There is only one King and one rewarder (“he rewards those who earnestly seek him” - Hebrews 11:6). If you invest your life in anything else your effort will be in vain. (1 Cor. 15:58).
If you want a serious challenge in life, join the Kingdom of God and engage the world in the spiritual battle that is underway and gain a position in the only Kingdom that will remain forever (Luke 1:33).