"Never Never" is a mystery/thriller novel co-written by Colleen Hoover and Tarryn Fisher. It was published in 2015 and is the first book in the "Never Never" trilogy.

The story follows the two main characters, Charlie and Silas, who wake up with no memory of who they are and how they got there. They quickly realize that they are both seniors in high school and have been dating for a year. However, they have no memory of each other, their relationship, or anything that has happened in their past.

As they try to piece together their memories and figure out what has happened to them, they discover that everyone in their town is hiding something, including their families and friends. The two of them are determined to find out the truth, but the more they uncover, the more dangerous their situation becomes.

As they delve deeper into the mystery, they start to realize that their forgotten past is somehow linked to a string of unsolved disappearances that have occurred in their town over the years. They are also plagued by strange hallucinations and visions that may hold the key to unlocking their memories.

The book is told from both Charlie and Silas's perspectives, with alternating chapters that provide insight into their individual struggles and experiences. The story is fast-paced and suspenseful, with plenty of twists and turns that keep the reader guessing until the very end.

"Never Never" is a thrilling mystery that keeps the reader on the edge of their seat. With its complex characters, intriguing plot, and unexpected twists, it is a must-read for fans of the mystery and thriller genres.