It is a difficult task to write a sequel to a book which was probably only meant to be a stand-alone. And yet Erik J. Brown delivered.
All That's Left In The World is one of my favourite books of the last few years. Going into The Only Light Left Burning, I already cared so much about these boys and their relationship, but I soon discovered that there was even more love for me to have for them and the little found family they were building...
The "post-apocalyptic" part is there but probably not as "apocalyptic" as some may imagine. It's more about making it through the travels, finding people who will care for you like you will care for them, and also just living your teenage / young adult life ...
A+ !