Well, there are several options. Some people find it on websites like Crunchyroll Manga or Viz Media. But be careful to choose legal and reliable sources to support the creators.
Personally, I think both have their own merits. The Tensura manga is great for those who are new to the series or just want a more straightforward visual experience. The panels are well - drawn and can easily show the progression of the story. On the other hand, the light novel is a treat for those who love to get lost in detailed worlds and complex character development. It allows you to use your imagination more as you read the detailed descriptions. So, it's really a matter of whether you value the visual aspect more or the detailed written content more when deciding which one is better.
Well, the Tensura manga and light novel vary in their narrative styles. The light novel is written in a more literary way, with detailed prose and a focus on the internal monologues of the characters. For instance, Rimuru's growth as a character is explored in great depth through his own thoughts in the light novel. The manga, being a visual medium, might simplify some of these aspects to make the story more accessible at a glance. Additionally, the manga might adapt the story in a way that caters more to the visual appeal, like having more dynamic panel layouts during fight scenes compared to the relatively more straightforward descriptions in the light novel.
Some local libraries might also have the Tensura novel in their collection. You can check their catalogue and borrow it if available. Additionally, there could be some fan - made translation websites, but make sure they are legal and reliable sources.