I'm not entirely sure as there could be many novels with 'beetle' in the title. It might be about a beetle's life, its adventures, or perhaps a beetle could be a symbol in a more complex human - centered story.
Since I'm not familiar with this specific 'beetle novel', I can't tell you the author. It could be an indie author or a well - known writer. You might need to do some research in libraries or online book databases to find out.
Another idea is a time - travel fanfiction. Blue Beetle and Black Beetle could be sent back in time to a crucial moment in their predecessors' lives. They then have to make sure not to disrupt the timeline while also trying to gain some knowledge or power that can help them in their present - day battles. This would allow for exploration of their origins and how they've evolved over time.
One common theme could be the fear of the unknown. Beetles are often small and hidden, so when they are made into a source of horror, it plays on our fear of what we can't see or fully understand.
Since it's called 'beetle boy novel', the beetle boy is surely a main character. He could be joined by other characters such as a mentor figure who helps him understand beetles better. There might also be antagonists, perhaps people who are against the beetles or what the boy is trying to do with them. Maybe there are some fellow beetle enthusiasts as well who become his friends along the way.
The main plot of 'beetle boy novel' likely revolves around a boy and his relationship with beetles in some way. Maybe he discovers special beetles, or perhaps he has an adventure involving beetles. Without reading it, it's hard to say exactly.