Ray Daniel Books in Order

After his wife's murder, software engineer Tucker is drawn back to their former employer by another killing. Investigating a controversial security project, he searches for links between the deaths and people determined to control the valuable technology.

A dead man outside Tucker's Boston home bears a startling resemblance to his late father. Discovering a half-brother and a hidden second family, Tucker investigates the murder while confronting secrets that undermine everything he believed about his past.

Tucker's young cousin is kidnapped during a sledding outing, her mother is killed, and her father is arrested. Searching for the missing girl puts him between rival criminals eager to seize control of her father's organization.

After a hacker targets his young cousin, Tucker threatens the culprit online and then finds him murdered. Accused by the hacking community and bombarded with death threats, he pursues a killer known as the HackMaster.