Which Spy Series Has The Most Realistic Intelligence Tradecraft?

What happens when two worlds collide? One world is filled with crime, death and destruction and the other filled with the need for justice and to serve and protect? 25 year old Agent Teagan Mulholland is about to be thrown undercover into the world of the mafia. To bring down the infamous Moretti family, a family her department have been trying to take down for 25 years. The man she needs to get close to is none other than 30 year old Don Antonio Moretti, the most dangerous man in the country. Her target, the man she needs to take down to redeem herself. But all is not as simple as one would think. Will the truth be revealed about who she is? Can love conquer all? Will everything that she has hidden come to light? Will her family’s past be uncovered? Will either Antonio or Teagan come out unscathed? Or will the betrayal and deceit destroy everything they have both worked hard for? The answers will all be uncovered.

Ellen Burge is a famous spy who is known as Chizuki. One day she found out that her friend Luna Bloomberg is working in an illegal organization that was built by his other friend named James Carter the younger brother of her crush William Carter. Will Ellen choose to protect her friends or will she finish the mission to kill Them?

Special Agent Violet (sometimes Secret Agent Violet) is one of the FBI's best agents. She's very good at deducing people and observing things most people missed. She's socially inept with no friends. She's very dedicated and loves her work...so much. The word love is alien to her. Relationships were nothing for her. She just needs work, work, work, and work. Her heart was stone-cold. "Karate chopping the clichés and norms all in a dress." She's a special agent. And she's Violet.

Octavia a well trained spy is sent as an undercover agent to infiltrate one the most powerful Mafia bosses Alfredo De El. Betrayed by her ex lover, and his mother she builds an ice stone heart that is melted the moment Alfredo picks interest in her and her true identity comes between their love.

A story about a heroine as she experiences the ups and downs of a high school life while striving to finish her mission as a secret spy. But, is it really that easy being a secret spy in high school?

Fed up with the perilous life of a deadly agent, Allison Miles decides to start anew. She relocates to a new city, adopts a new identity, and deliberately gets fat to avoid recognition. While at this, she finds love with billionaire tycoon Williams, and they marry. For a while, Allison believes she is loved by Williams. However, her whole world comes crumbling at her feet when she discovers Williams cheating with her best friend of two years, Jessica. The betrayal cuts deep, and Williams's remorseless attitude only increases her pain. Desperate to escape the agony, Allison runs out into the stormy night, her vision blurred by tears. And things get terrible when a car accident results in the loss of her three-month old pregnancy. Lying in a hospital bed, Allison's suffering worsens as Williams and Jessica visit her, not to offer comfort and apology but for Williams to shove divorce papers in her face, demanding she signs them. Devastated and heartbroken, she succumbs, freeing Williams to be with Jessica. With the pain eating through Allison, she decides to go back to her old life as a powerful secret agent.  A year later, she returns, utterly different with a great body. She has regained her skills and power as a secret agent. Confident, strong and ready to take control, she is fueled by a burning desire for revenge. And she vows to make Williams and Jessica pay for their betrayal.