For Naruto, if there's 'Trouble in Time', he might be separated from his friends. For instance, if time is distorted, he could end up in a timeline where Sasuke never returned to Konoha. This would deeply affect Naruto as his goal was always to bring Sasuke back.
One possible 'Trouble in Time' scenario could be a time - traveling villain who goes back in time to change key events in Naruto's history, like preventing the formation of Team 7. This would create chaos as relationships and events that were meant to happen, such as Naruto's growth under Kakashi's tutelage, would be disrupted.
He could ask his friends like Sakura or Kakashi. They might be more aware of different forms of literature or stories. Kakashi especially reads a lot, so he might know something about fanfiction.
One possible reason could be that fanfiction is often spread across various platforms and some might be restricted in the Naruto universe. Maybe the ninja world has its own regulations regarding unauthorised fictional works about their heroes.
It can make characters act out of character. For example, a usually calm and collected ninja might become reckless when in love. They could take unnecessary risks to protect their loved one or to prove their love. This can put them in danger and also affect their reputation among their peers.
Sometimes, in Naruto fanfiction, love can bring trouble when it involves a love triangle with a powerful and unpredictable character. For instance, if Orochimaru gets involved in a love triangle between two young ninjas. His motives are always suspect, and his presence can create chaos. The two ninjas in love might find themselves in dangerous situations as they try to deal with Orochimaru's interference while also dealing with their feelings for each other.
Another possibility is that Hinata could be the main love interest. Naruto and Hinata had a relationship that developed over time in the original Naruto story. In this fanfiction, their love could be filled with more crazy and troublesome situations, like family objections or some new enemy targeting their relationship.
Perhaps in this 'naruto crazy trouble with love fanfiction', Naruto is in love with a character who has a really difficult past. Their relationship is full of trouble because of her past traumas and secrets. Naruto has to be really patient and understanding, and they get into all kinds of crazy adventures together as they try to work through their issues.
Hard to say without more information. If it has mild trouble - like a child losing their pet and trying to find it - then it could be for all ages. But if it has more serious or complex 'trouble' like crime scenes, it might not be for very young kids.
Sorry, I'm not familiar with the author of this work. There are so many books out there and without more context or research, it's impossible for me to tell. You may search for it on some well - known book - related websites or ask in a local bookstore.