The James Patterson novel Along Came a Spider is the first book in the Alex Cross series. It is the story of Alex Cross, an African American detective in Washington D.C., who is called in to help a kidnapping case by the Secret Service.
The case in Along Came a Spider is the kidnapping of Megan Rose, the daughter of Senator Edward Rose and his second wife, Juilette. The kidnapper is Gary Soneji, a former teacher and rape suspect, who has quit his job and is living off the grid. As the FBI and Secret Service search for the missing girl and her kidnapper, they have few clues. All they have to work with is a note and what they know about Gary Soneji.
The FBI and Secret Service have their focus on Gary Soneji, but Alex Cross follows his own gut instincts as he investigates the case. He begins to feel a connection between Megan and Gary, which leads him to believe that Gary may have a personal agenda for the kidnapping. As Alex digs deeper, he realizes that he is dealing with a man who is obsessed with kidnapping and murder, and has a plan for Megan. At the same time, Alex himself is in danger of being exposed as the kidnapper's next target.
Alex's investigation leads him to New Orleans, where he finds a clue that leads him to Gary's hideout. When he finds Gary, the confrontation between them is intense and Alex is able to gain some insight on Gary's motives. Alex learns that Gary's plan is bigger and more dangerous than he had anticipated, and he has to act fast to prevent any further harm to Megan or anyone involved.
Once Alex has all of the information he needs to bring justice to the case, he must also decide what will happen to Gary once he is caught. Alex makes a decision to take justice into his own hands, and he calls upon an old friend from the FBI who is willing to help him out.
Through the twists and turns of Along Came a Spider, Alex comes to understand the true motivation of the kidnapper and he is able to solve the case, but not without putting himself in danger. With the help of his old friend and the power of his own senses and judgment, Alex succeeds in bringing Gary to justice. Though Megan has been returned to her family, the case has revealed a dark side in Alex, a side that almost cost him his own life. With this, Along Came a Spider serves as a reminder of the dangers of pursuit and the power of justice.