Memento by Amie Kaufman & Jay Kristoff (Spoiler-Alert)
It can be "right" to kill one person to save five. Or kill a thousand to save a thousand and one. Your daughter taught me that lesson, priest. I will remember it well. Memento.
Well that hit me right in the feels. I'm always hesitant to read novellas from my favorite series because I doubt that they will be able to be as amazing as the rest of the books in such few pages. Yet, somehow, Momento, within its 82 pages, manages to captivate the reader with just as much wonder and terror as the other 600 page books in the series.
It details the backstory and creation of AIDAN, arguably the most interesting character in the series. It did not feel like this was written as an afterthought; it truly felt like the authors had this backstory for him while writing the whole series. It was heartbreaking to see what caused him to become so sentient yet callous in the following books. That one girl created both a monster and a savior.
If you have read the other books in this series and are one of the few hundred people with this novella and haven't gotten around to it yet: Read it!!! You won't regret it.
Song I was reminded of while reading: Uproar