Books have always been a form of entertainment from way back. And now books have trannscended into a more digital age, namely e-books. These can be found in the internet and is shared among people. And among these, I usually read light novels.
They are great since the story line is a lot more complete than the anime or the manga (if it has an adaptation). It is also much more vivid in the character’s expression leaving you to imagine rather than watch what is happening reuslting in a more in-depth and colorful picture of the scenes depicted in the story.
Light Novel cover attached to this is entitled Washio Sumi wa Yuusha de Aru
This is about girls who have been chosen by the “Taisha” to defend their life tree, which protects the people of their world from the mysterious beings called “Vertexes”. And through defending they bloom resulting in greater power but it causes diverse side-effects to their bodies in the real world.
Read it and you might like it. By the way, it has an anime sequel if your not into light novels, named Yuuki Yuuna wa Yuusha de Aru