Yes, it is quite popular. 'Solo Leveling' has a large and dedicated fan base around the world. The story, with its unique take on the isekai and leveling - up genre, has captured the imaginations of many readers. It features an interesting protagonist and a well - developed power - up system that keeps readers engaged from start to finish.
Solo Leveling is both. It originated as a web novel and was then transformed into a manga. The manga adaptation brought the story to life visually for many fans.
I'm not sure specifically as there could be many leveling solo light novels. Generally, it might be about a character who levels up alone in a fictional world, facing various challenges, monsters, and quests.
I'm not entirely sure as 'solo leleving' seems misspelled. But generally, a light novel is a type of Japanese novel mainly targeting young adults. It often contains elements like fantasy, adventure, and unique characters. It's usually written in a simple and engaging style, with some having anime or manga adaptations.