Cross My Heart is the 21st novel in the Alex Cross series written by author James Patterson. The novel takes place after Alex Cross, Run, in which Alex tries contemplating a life outside the Metro Police after the apparent death of Ava, an orphan girl they took in. It was initially not planned by Patterson, but was later confirmed to be in the works. The novel once again features Metro Police detective Alex Cross. Cross My Heart was released 20 years after the original novel, Along Came a Spider.Amazon.com website, at https://www.amazon.com/Cross-My-Heart-Alex/dp/0316210919 . The novel's events, having ended on a cliffhanger, were continued in the next novel, Hope to Die.
