The next few books of Red Revenge may confuse some people, so I (with my professional little self) am going to try and clarify things:
Sam's father was killed in (surprise!) 2012 when Sam was (surprise!) 12. After two years of not being able to legally have vengeance, Sam (you'd never guess) donned the mask of Red Revenge and went out to kill the man who murdered his father. He was stopped by a police ambush, but the man who killed his father (later known as Reaper) was arrested, escaping judgement by faking being insane.
During a battle with muggers, a girl from Sam's school witnessed him unmasked and used this knowledge to become his "Oracle".
Revenge was a "secret" from Law Enforcement until Gremlin (electrical themed villain) forced Revenge to an act of heroism in public. The public praised him and he became to New York what Batman was to Gotham.
At age 15, Alexa Lynx (Nightress or Night Hunter at the time) was abducted by escaped felon Reaper. Revenge was held back by Alexa from killing the man and again Reaper was imprisoned. Alexa turned from theft and became a hero, moving (with Sam's help) to Manhattan. The cops there did not receive her as friendly as NY did RR.
At age 16, Sam's girlfriend Rose Walker had to move to Minnesota where her father had become Governor. (her parents were divorced and her mom was in serious medical condition). Sam was bitter at the fact Rose not only revealed their IDs to her father right before they moved, but the fact she "abandoned" him. He became further angered when she joined the international group The Freedom Fighters.
For a year, Sam was a loner fighting crime in NY. Late into 2016 (around December) a twelve year old boy named Ryan Salvaterez (Eagle) came to him and asked him if he could be Sam's sidekick (not partner). Sam agreed, and after a month, entrusted the boy with his secret ID. Ryan quickly sold it to his sister Lexi (Nightingale) for protection from the Black Hero. Lexi was a criminal and used her powers of singing (which controlled the impulsiveness of the mind) to force Grant not only to kiss her, but to reveal his ID.
Reaper escaped for the third time and struck at Revenge's core, killing Ryan. Revenge had no choice but to let Reaper escape n order to get Ryan to a hospital. Ryan died on the operating table and Nightingale blamed Revenge for his death. Reaper was arrested by police that night.
At age 18, a the Hundred Families (a Chinese version of the mob, except more powerful and set heavily in ancient tradition) put out a hit on Samuel Grant. After a confrontational battle, Holly Green (the assassin later known as Emerald) willingly became Revenge's "POW". When the Families tried to silence Green, Revenge literally fought until he was physically no longer able to. Green came to his rescue and after the Families were sent back to China, Green became Grant's new partner: Emerald.
At 19, a strange meteor crashed in Minneapolis, Minnesota. Vendicta was cloned and replaced. When Revenge discovered this, he quickly called the Freedom Fighters, but they had already rescued the original and captured the clone Vendicta.
An alien task force landed on Earth and began an assault on the most heavily populated areas, stressing on New York. Despite the government's attempts, only nuclear missiles damaged the alien ships long enough, and the President refused to launch them on heavily populated areas.
The Freedom Fighters, now composed of every single hero on Earth, attacked the aliens and managed to drive them back. Two died and several were critically injured including the leader and Revenge's arch-enemy Bluestreak. Revenge was appointed head of the Freedom Fighters. Using Grant Technology satellites, he discovered the original attack was a scouting mission and the real threat was coming.
Splitting the Freedom Fighters into a small group of six (including himself and Emerald) and the rest on the ground to stop the Venusians, Revenge and his band of six headed to Earth's orbit and the moon where they shot down the alien's supplies, leaving the mother ship unable to operate with no supples. The Venusians retreated and never attacked again.
When Sam was twenty, a new terrorist cell called the Undead began attacking countries around the world. With the Freedom Fighters off world, a new Vigilante surfaced in England, calling himself Red Revenge. The original, Samuel Grant went to investigate at the same time, Holly was sent in to the CIA to assist the government in any way possible to bring down these terrorists. She constantly supplied Sam with information.
Grant and the U.K. RR did not get along well. Seeing Rose Walker (Vendicta) had feelings for him though, Sam did nothing to hurt the boy majorly. --SPOILERS HIDDEN-- After the battle in Egypt, Sam returned to England and fought the last group of these terrorists.
Immediately following this, Revenge (Grant) was forced to travel to Russia with Green (as an undercover agent) and investigate suspicious activity revolving around nuclear power plants. Grant and Green quickly discovered the former World Super Power the U.S.S.R. Had cloned Joseph Stalin and were staging an uprising to take back Russia and re-instigate the Cold War.
Revenge stopped this attack, pushing the U.S.S.R. Back into hiding. Revenge returned to the U.S. and Green was relieved from duty in the C.I.A. By now, Grant was 22 and started college. However, his life refused to remain peaceful. Reaper, the Dealer, and every other major enemy of Revenge's staged a major jail-break from North Penintentiary (Revenge's version of Arkham Asylum or Strikers Island). They quickly became the head of G.O.O.N. (Gang Of Organized crimiNals) (Which RR thought was stupid). They waged war on Revenge, but were quickly defeated.
--SPOILERS FOR DIVIDED WE FALL--
Life managed to stay still until Grant was 24. Starting two months after his 24th birthday, Revenge was visited first by the devil himself, then by Trapper (a terrorist leader who held NY hostage for five months), then by a ghost (twin brother) of his departed side-kick Ryan. Sam's mother died in an explosion on Grant Tower (which was slowly re-constructed over 5 years) and Sarah (the school girl who saw Sam unmasked and was his "Pracle) was killed as well. One of Revenge's closest friends was driven insane and he killed her torturer.
Go read What Matters and The Legend Falls (2013/2014)