Status Updates From The Eleventh Plague

The eleventh plague is about a boy named Steven and his dad living in a post-apocalyptic world and they try to survive in everyday life. I just read a part where Steven and his dad come across a group of men holding people captive and they want to try and save them.

The main theme in my book is friendship and it is shown a lot. There are multiple parts where they show this theme. I can recall reading a part in the last chapter where on of the characters tells the others that "this is what having friends feels like", and that really made me realize that the theme in this book is friendship.