"Back Up" by Paul Colize is a gripping thriller that weaves together multiple storylines spanning several decades and continents. The novel begins with the disappearance of Laura, a young woman who vanishes without a trace while on a road trip with her boyfriend in the United States. As Laura's family and friends grapple with her disappearance, they are left with unanswered questions and a sense of unease. Meanwhile, in Belgium, a retired police officer named Daniel becomes obsessed with solving a cold case from the 1970s involving the murder of a young woman named Sophie. Despite the passage of time, Daniel is determined to uncover the truth and bring closure to Sophie's family. As Daniel delves deeper into the case, he uncovers shocking revelations and connects Sophie's murder to a larger conspiracy involving international espionage and political intrigue. With the help of a journalist named Victoria, Daniel begins to unravel the mystery, but soon finds himself in grave danger as powerful forces seek to silence anyone who threatens to expose the truth. Through a series of twists and turns, "Back Up" explores themes of love, loss, and the consequences of secrets kept hidden for decades. As the various storylines