It depends. If the novels are in the public domain, like those from Project Gutenberg, it is completely legal to read them for free online. Public domain works are no longer under copyright protection.
Celestial Bane novels could be read online for free. The specific chapter and table of contents could be found in the search results, but there was no specific reading link. It is recommended to use a search engine or a related reading platform to search further to find free online reading resources for Celestial Bane.
Juliette is a main character. She has a special power that she has to deal with in this dystopian world. Adam is also important. He has a connection with Juliette and they go through a lot together. Warner is another key character. He's complex, being both a villain and someone with his own motives and desires.
Well, in 'Shatter Me' dystopian novels, there's a sense of isolation for the main character. Juliette is isolated because of her power which she can't fully control. The novels also have a lot of action - there are battles and struggles against the oppressors. And the way the future is envisioned, with limited resources and a lot of fear among the people, is a typical feature of dystopian novels.
In these novels, Warner is a very important character. He has his own motives and his character arc is quite complex. Kenji is also a main character, often providing support and comic relief in the story.