Some popular ones might include those that expand on the unique world - building of the BNA universe, with detailed stories about the different animal - human hybrids. For example, there could be novels that focus on the backstories of the main characters, their struggles in a world where they are different. However, without more specific information, it's hard to name exact popular titles.
You can try looking for them in specialized bookstores that carry a wide range of light novels. Some large chain bookstores might also have them in their manga or light novel section.
Since it's a brand new animal novel, it could be exploring the concept of animals in a whole new light. It might combine elements of fantasy and reality. Maybe the animals in the novel have special powers or abilities that are unique to them. It could also be about the bond between humans and animals if there are human characters involved. The story could take place in a completely made - up world filled with these amazing animals, or it could be set in a more familiar, but still somewhat altered, real - world environment.
I don't have enough information to determine if '55 minutes light novel' is popular. There are so many light novels out there, and without any sales figures, reviews, or general buzz, it's difficult to say.
A light novel typically has a few defining characteristics. It usually has a simple and easy-to-read writing style, often with illustrations to enhance the story. The plots are usually focused on younger audiences and have elements like fantasy, romance, or adventure.
It's not always straightforward to tell. You have to consider elements like the story's complexity, the way it's presented, and whether it originated from a specific light novel publishing line. Sometimes, it can be a bit of a grey area.