Yes. The manga of B: The Beginning expands on the plot and characters compared to the original source. It offers additional depth and details for fans to explore.
It's moderately popular. The manga's popularity depends on various factors like its art style, plot, and the way it connects with readers. Some find it captivating, while others might not be as interested.
Sorry, I don't have the exact manga in mind. You might need to search through specific manga genres or check popular manga review sites for that information.
There are several options. Some online manga platforms might have it. However, make sure to use legal and authorized ones to support the creators. You could also check your local library's digital collection.