I'd suggest checking manga forums or dedicated Bleach fan sites. They often have detailed breakdowns and recommendations on where to pick up after a specific part. Sometimes, the author or official sources might provide cues as well.
Honestly, I don't know when the TYBW manga starts. But you could search manga databases or ask in manga enthusiast communities to get the details you need.
I think they can be popular. In today's fast - paced world, a lot of people don't have the time or patience to read a long, drawn - out novel. One hour novels offer a quick escape and entertainment. They can also be great for introducing new readers to the world of literature. However, traditional long novels still have a large following, so it's not like one hour novels are taking over the market completely.