That’s the book currently read by the intermediate book club (i.e. people who should be at N3+ level). Many of us are finding it pretty hard actually. There’s a bit of conversation about that in the home thread and this week’s thread:
As the name implies, they are “light”, so mostly entertainment that should not make the reader think too much (pulp, basically). Demanding on the series, the writing style will be closer to an actual novel (e.g. 氷菓) or a manga (e.g. Sword Art Online).