The Good Guy by Dean Koontz

The Good Guy is a thriller novel by American author Dean Koontz, which was released on May 29, 2007.
Timothy Carrier is an unassuming stonemason who, while having a beer at his regular bar, is accidentally mistaken for a hitman by a stranger who hands him an envelope containing $10,000 and a photo of the intended victim, a writer named Linda Paquette. The real killer arrives soon afterwards, and Tim manages to bluff him by pretending to be the client, saying he's had second thoughts, and cancelling the hit while giving the killer the $10,000 as a "no-kill fee". Tim covertly follows the killer outside, and is shocked when the killer places a roof-mounted police light on top of his car before driving off; the hitman is a cop. Tim tracks down Linda and flees, using his network of friends to stay one step ahead of harm, while being tracked by the hitman. Over time, Tim and Linda develop feelings for one another. Linda confesses to Tim about her haunting childhood; her parents, former preschool teachers, were unjustly accused of committing horrific sexual crimes on their students, including their daughter. Linda was separated from her parents, as both of them had to go to jail. Eventually, Tim takes sanctuary in his mother's house, and confronts the hitman which ends with a gunfight. Tim kills the hitman, just as a mob of FBI agents raid into the house. To calm down the waters, an FBI agent reveals the hitman had actually been employed by an American politician. Long ago, an aide of that politician had lunch with a member of a terrorist organization... (Summary by Wikipedia)

Frankenstein - Lost Souls by Dean Koontz

Frankenstein - Lost Souls is the first novel in the second trilogy of Dean Koontz's "Frankenstein" series, and the fourth book overall. It debuted at #7 on the New York Times Hardcover Best Seller list.
The book Frankenstein - Lost Souls is released in hardback since 15 June 2010. Book Five will follow in May 2011, and Book Six in May 2012.
Dean Koontz's Frankenstein is the collective title of four novels co-written by Dean Koontz. Though technically of the mystery or thriller genres, the novels also feature the trappings of horror, fantasy, and science fiction.
The first trilogy has been published: Prodigal Son, co-written with Kevin J. Anderson, was published in 2004; City of Night, co-written with Ed Gorman, was published in 2005; and Dead and Alive, written without a co-writer, was released on July 28, 2009.

At the same time that the final novel's authorship was confirmed, having previously been slated as by Dean Koontz & Ed Gorman, Koontz's 'collaborators' on the earlier novels were retrospectively removed as co-authors, and all new editions of the novels are credited as by Dean Koontz alone.

The second trilogy began publication in May 2010 with Lost Souls, continuing with as-yet-untitled novels in May 2011 and May 2012... (Summary by Wikipedia)

The Dead Town by Dean Koontz

The Dead Town is the fifth novel in Dean Koontz's "Frankenstein", which is the collective title of five novels co-written by Dean Koontz.
The war against humanity is raging. As the small town of Rainbow Falls, Montana, comes under siege, scattered survivors band together to weather the onslaught of the creatures set loose upon the world. As they ready for battle against overwhelming odds, they will learn the full scope of Victor Frankenstein’s nihilistic plan to remake the future—and the terrifying reach of his shadowy, powerful supporters. Now the good will make their last, best stand. In a climax that will shatter every expectation, their destinies and the fate of humanity hang in the balance. Victor Frankenstein, having applied his own research to extending his own mortality, is now known to the world as Victor Helios. To the public, Helios is a philanthropic millionaire and a beneficiary to mankind. In reality, he has experienced much in two hundred years since he created a man from fragments of the corpses of criminals. However, in secret, Helios has become obsessed with overthrowing true humans, which he refers to as "the Old Race," and replacing them with his superior creations. After the failure of his first rebellious monster, he put himself through extensive bodily modifications to extend his life span and increase his physical power. This process has left his physical form scarred and deformed. Helios has acquired wealth and power from selling his knowledge to, among others, Hitler, Stalin, and the People's Republic of China. He respected Hitler and was greatly grieved at the end of World War II... (Summary by Wikipedia)

Dead and Alive by Dean Koontz

Dead and Alive is the third novel in the first trilogy of Dean Koontz's Frankenstein series. Originally intended to be co-authored by Ed Gorman and Dean Koontz, Dean Koontz stated that he would be writing this alone. by Dean Koontz.
Deucalion, the legendary monster, is a heroic figure dedicated to battling the evil that gave him life. The megalomaniacal Victor Helios has unleashed his engineered killers on modern-day New Orleans. Detectives Carson O'Connor and Michael Maddison are Deucalion's all-too-human partners trying to end the reign of terror of Helios's killers: Victor Frankenstein, having applied his own research to extending his own mortality, is now known to the world as Victor Helios. To the public, Helios is a philanthropic millionaire and a beneficiary to mankind.
In reality, he has experienced much in two hundred years since he created a man from fragments of the corpses of criminals. However, in secret, Helios has become obsessed with overthrowing true humans, which he refers to as "the Old Race," and replacing them with his superior creations.
After the failure of his first rebellious monster, he put himself through extensive bodily modifications to extend his life span and increase his physical power. This process has left his physical form scarred and deformed.
Unknown to all, he had created a clone of himself, who has the same goal as his original but considers himself to be as foolish as the humans he tries to replace... (Summary by Wikipedia)

Odd Thomas by Dean Koontz

Odd Thomas is a thriller novel by American writer Dean Koontz, published in 2003. The novel derives its title from the protagonist, a twenty-year-old short-order cook named Odd Thomas.
In the beginning of the book, Odd Thomas is silently approached by the ghost of a young girl brutally raped and murdered, and through his unique ability to understand the dead, is psychically led to her killer, a former schoolmate named Harlo Landerson. With this opening, we are introduced to Odd Thomas's world. Dean Koontz soon discloses how Odd was named and begins, layer by layer, to show how Odd Thomas's dysfunctional upbringing has shaped his life, and as those details are uncovered, his supernatural abilities begin to make more sense. We see Odd Thomas at work as a short order cook in a California desert town, and in a fateful 24-hour period, he meets a suspicious-looking man in the diner followed by bodachs, shadowy spirit creatures who appear only during times of death and disaster. This man has an unusually large swarm of bodachs following him, and Odd Thomas is convinced that this man is connected to some terrible catastrophe that is about to occur. To gather more information about him, Odd uses his gift of supernatural intuition, which his soulmate Bronwen (a.k.a. Stormy) Llewellyn calls "psychic magnetism," to track him down.
Odd Thomas's sixth sense leads him to Fungus Man's home, and Odd Thomas begins to uncover more details about the man and a mysterious other-worldly link to the dark forces about to be unleashed on the town of Pico Mundo... (Summary by Wikipedia)