Question: What retired FBI agent authored a book series about a domestic terrorist who killed 3 people and injured 23 others?

Context articles: Rockport train wreck
Italian Unabomber
Tasikmalaya derailment
Attack on Cloghoge checkpoint
Ted Kaczynski
1981 West Bend tornado
Joaquín &quot;Jack&quot; García
May 2016 Diyarbakır bombing
A Journey to the Center of the Mind (book series)
Oklahoma City bombing

The Rockport train wreck was a train accident that occurred in Rockport in Mansfield Township, New Jersey, about three miles outside of Hackettstown, New Jersey, on June 16, 1925.
 A violent storm washed debris onto a grade crossing, derailing a Lackawanna Railroad (DL&W) train.
 The crash killed 42 passengers and five crewmen and injured 23 others.
The Italian Unabomber is a name given by the international media to an unknown terrorist tied to a series of booby-trap bombings in northern Italy, specifically in the Veneto and Friuli-Venezia Giulia regions, which began in 1994.
 Italian law enforcement officials and the FBI believed that Unabomber is Elvo Zornitta, a 49-year-old engineer who has been charged with planting 20 bombs after police raided his home in August 2006.
 Though it is possible a group is behind the attacks, the prevailing assumption of the investigation and media reports is that one man is behind the crimes.
 Dubbed the Unabomber by the Italian media and correspondingly called the Italian Unabomber by the international press, the bomber is named after the American convicted murderer Theodore Kaczynski, referred to as the "Unabomber" during his criminal career.
 Kaczynski planted miniature bombs in mail packages sent to selected targets that killed three people and injured 23.
 Similar to Kaczynski, the Italian Unabomber hides bombs in everyday items, though never targeting anyone in particular.
 Instead, his bombs are set off by whoever happens to handle the booby-trapped object, including pens, candy containers and food jars.
 These objects are generally then placed in public places to await activation and are designed not to kill, but only to seriously injure a single person at short distance.
 Many of these devices are meant for small children using chocolate eggs, coloring markers, and bubble blowing tubes.
 Generally, the explosions severely injure limbs, hands, arms, faces and most of all eyes.
 Unlike Kaczynski, the attacker has made no political or economic demands.
 Several of his devices seem to have been planted in the "Continente" supermarket in the city of Portogruaro.
The Tasikmalaya derailment occurred on 5 April 2014 when the passenger train "Malabar", with 250 passengers on board, was derailed by a landslide in Tasikmalaya, West Java.
 The accident killed 3 people and another 35 were injured.
 Heavy rain triggered the landslide, which derailed the train as it traveled through Java, the most populous island in Indonesia.
The attack on Cloghoge checkpoint was an unconventional bomb attack carried out on 1 May 1992 by the Provisional Irish Republican Army (IRA) against a British Army permanent vehicle checkpoint.
 The IRA's South Armagh Brigade fitted a van with wheels that allowed it to move along a railway line.
 A large bomb was placed inside the van, which was then driven along the railway line to the target.
 The explosion killed one British soldier and injured 23 others.
 The compound, just north of the village of Cloghoge in County Armagh, on the southern outskirts of Newry, was wrecked.
Theodore John Kaczynski ( ; born May 22, 1942), also known as the Unabomber, is an American mathematician, anarchist and domestic terrorist.
 A mathematical prodigy, he abandoned a promising academic career in 1969, then between 1978 and 1995 killed 3 people, and injured 23 others, in a nationwide bombing campaign that targeted people involved with modern technology.
 In conjunction, he issued a wide-ranging social critique opposing industrialization and advancing a nature-centered form of anarchism.
The April 4, 1981, West Bend tornado was a fatal F4, anticyclonic tornado that struck the Wisconsin city of West Bend in the early morning hours of April 4, 1981.
 It killed 3 people, and injured another 53.
 The tornado was largely unexpected and the storm that produced it did not display features of a typical severe storm.
 Because of this the National Weather Service issued only a Severe Thunderstorm Warning prior to the West Bend Tornado, causing local law enforcement to not sound the tornado sirens in time.
Joaquin "Jack" Garcia (born 1952 in Havana, Cuba), also known as Jock and Jocko, is a retired FBI agent best known for his undercover work infiltrating the Gambino crime family in New York City.
 Garcia is regarded as one of the most successful and prolific agents in the history of the FBI.
The May 2016 Diyarbakır bombing was a car bomb attack on an armored police vehicle in the Bağlar district of Diyarbakır, Turkey on Tuesday 10th May 2016 at approximately 10:50 local time.
 The attack, which targeted a police vehicle that was carrying officers escorting seven recently arrested Kurdish militants, killed 3 people and wounded at least 45 others including 12 police officers.
 The vehicle was carrying seven detainees, suspected members of the Kurdistan Workers Party (PKK) to a routine health check.
 The PKK's armed wing, the People's Armed Forces (HPG), later claimed that one of its trucks was transporting explosives and got shot, making it explode.
A Journey to the Center of the Mind (JCM) is a book series authored by James R. Fitzgerald, retired FBI agent, criminal profiler and forensic linguist.
 The series, published by Infinity Publishing between 2014 and 2017, consists of three volumes detailing chronologically the life and career circumstances that led to Jim Fitzgerald's involvement in the FBI's UNABOM investigation, which ultimately resulted in the arrest and prosecution of Theodore Kaczinski, also known as the Unabomber.
The Oklahoma City bombing was a domestic terrorist truck bombing on the Alfred P. Murrah Federal Building in downtown Oklahoma City, Oklahoma, United States on April 19, 1995.
 Perpetrated by Timothy McVeigh and Terry Nichols, the bombing killed 168 people, injured more than 680 others, and destroyed one-third of the building.
 The blast destroyed or damaged 324 other buildings within a 16-block radius, shattered glass in 258 nearby buildings, and destroyed or burned 86 cars, causing an estimated $652 million worth of damage.
 Extensive rescue efforts were undertaken by local, state, federal, and worldwide agencies in the wake of the bombing, and substantial donations were received from across the country.
 The Federal Emergency Management Agency (FEMA) activated eleven of its Urban Search and Rescue Task Forces, consisting of 665 rescue workers who assisted in rescue and recovery operations.
 The Oklahoma City bombing was the deadliest terrorist attack on American soil until the September 11 attacks six years later, and it still remains the deadliest incident of domestic terrorism in United States history.