Since I don't know the exact novel, it's hard to say. But it could have a young hero or heroine who is curious about the magic index. There might also be a wise old wizard or mage who guides them.
Well, without having read the exact 'a certain magic index novel', it could potentially be about a young protagonist who discovers a magic index. This index might hold the secrets to various magic spells, and the story could revolve around the protagonist trying to master these spells and use them to solve problems, like saving their world from an evil magic - user or uncovering a great mystery related to magic.
The novel mainly focuses on a world where magic and science coexist, and follows the adventures of the protagonist as he gets involved in various conflicts and mysteries related to this unique setting.
You can try looking in your local library. They usually have a wide range of novels, including magic - related ones. Just search in the fantasy or science - fiction section.
First, familiarize yourself with the basic setting of the magic world in the novel. It can help you better understand the plot. Second, pay attention to the characters' magic abilities and how they develop throughout the story. And third, don't be afraid to take your time and re - read parts that seem confusing.
You can try to find it in some local bookstores that have a wide selection of light novels. If not available there, check on well - known e - book platforms. Some of them might have it for purchase or even for free in a legal way.
You can try looking on popular online bookstores like Amazon or Barnes & Noble. They might have the digital or physical versions available for purchase and reading.