None Shall Sleep by Ellie Marney:

This book is 100% for the mystery/true crime lovers. With so many twists and turns Ellie Marney manages to write a book you never want to put down. When the FBI recruits 2 teens to help solve an active serial killer case, they are truly put to the test in order to stop the murders. The book encapsulates elements of bravery, intelligence, and the ability to solve intricate puzzles. Genuinely one of my favorite true crime books and I recommend it for everyone of all ages. The only criticism I could ever have for this book is the fact that it is sort of a slow start, but the moment the action happens you never want to put it down. None Shall Sleep stays one of the only books I have ever read in one sitting.