I read this for my 7th Grade English class with Mr. David Marsden. A very interesting story and worthy of appreciating.
Summary from Wikipedia
Brian Griffin is a school teacher who never accepts late homework and is extremely demanding of his students. After he gives out F's to a group of students who fail to turn in their papers on time, the students—the popular crowd—decide to get revenge by kidnapping him. Mark Kinney is the one most often singled out by Mr. Griffin, because the semester before, Mark had plagiarized a term paper with help from his former girlfriend, Lana Turnbolt, who stole the paper from the college she was attending at the time. This was the same college that Mr. Griffin had formerly served as an assistant professor. Instantly recognizing this paper, Mr. Griffin checked the college archives and then failed Mark and humiliated him in front of his class, making him beg to be allowed to take the course again.
Later, in the company of his wife Kathy, Mr. Griffin admits that he gave up a chance at tenure at the college, deciding to return to high school to teach students to write. While Mr. Griffin earned a Ph.D at University and became an assistant professor in the state college, Kathryn was a C student in high school and had later worked as a clerk in a department store.
The group of friends includes Mark Kinney, David Ruggles (president of the high school's senior class), Jeff Garrett (a basketball player) and Betsy Cline (the head cheerleader). Mark lives with his aunt and uncle Ivan, who helped him get back into Griffin's class, but Mark spurns them—leaving the house first thing in the morning and returning late at night. David is a good and popular student aiming to get the state university scholarship, so a poor grade in Griffin's literature class would jeopardize that. David faces further pressures in his life to succeed in order to be able to support his family, since his mother is in a dead-end secretarial job, and as his nagging and lazy grandmother lives with them. David hopes to fulfill the expectations of his father—whose alma mater was Stanford—and who had years ago left the family for some unknown reason. Jeff is completely obedient to Mark and does things for the group like driving them around and often paying for their meals. Jeff's parents do not approve of Mark, but assume that he hangs out with a well-adjusted student like Jeff because Mark comes from a dysfunctional family and must idolize Jeff, when it is actually the opposite. Betsy is spoiled and snobbish, being popular in high school social circles, and secretly has a crush on Mark, though she is Jeff's girlfriend.
Mark has the idea to kidnap Mr. Griffin, saying it's only as a prank to scare the teacher and "teach him a lesson", while it's really only because Mark wants revenge after Griffin made a fool out of him last semester.They drive Mr. Griffin to a secret place in the mountains—an area so remote, that Mark is the only one who has used it, for outings with his former girlfriend, Lana Turnbolt.
Betsy arrives in the parking lot after the boys have left with Mr. Griffin. She was late, thanks to a speeding ticket. Susan was supposed to get in the car with Betsy, but Susan doesn't want to take any more part in the scheme than she has to. Betsy heads to the mountains. Once she arrives, the group begins taunting Mr. Griffin, telling him to beg for his life or they would kill him. They find Mr. Griffin's medicine and don't give it back, eventually smashing the pills without knowing their purpose. Mark tells Mr. Griffin to beg or they will leave him there the whole night. However, Mr. Griffin refuses, so they abandon him there on Mark's orders, blindfolded and bound.
Later, Susan defies Mark and begs David to go check on Mr. Griffin. He gives in, and when they reach the spot, they find him dead. Susan and David hurry to find Mark, Jeff, and Betsy, who were at a basketball game. Mark decides that they will cover up their accidental murder instead of going to the police. Mr. Griffin's wife goes to the police the next day, because her husband was not home when he was supposed to be.
A few days after Mr. Griffin's death, a police officer pulls Susan from a class to question her, because she was the last person to see Mr. Griffin alive (or so they believe). Mark meets her in the hallway before she reaches the office and instructs Susan on what to tell the police. She tells the police that Mr. Griffin spent the whole conference looking at his watch and eventually got into a car with a pretty woman.
Everyone except for Susan heads to the mountains and they place Mr. Griffin in a shallow grave. David and Jeff do all of the digging. David secretly takes Mr. Griffin's Stanford class ring, because it reminds David of his father. Jeff takes the car and resprays it gray, telling his parents that it's a friend's car and he's fixing it. Then he and Betsy drive it to the airport and use a cloth to wipe off the fingerprints from the steering wheel. Susan does not go to help, because the group is afraid she might have a nervous breakdown. Betsy, who secretly has a crush on Mark, becomes resentful that he has asked Betsy to take a hands-on role in disposing the evidence, and is also jealous that Mark is spending so much time with a plain girl like Susan.
Mr. Griffin's wife, Kathy, pays Susan a visit at her home, upset because she believes that Susan lied in her report to the police. Mrs. Griffin points out that Mr. Griffin couldn't have been wearing his watch that day, because it was at home, broken. Susan gets nervous, but Mrs. McConnel backs up her daughter saying she would never lie. Then arrives David and Mark. Mrs. McConnell ends the session by saying that if Susan remembers anything she will contact Kathy.
Days later, Mark's ex-girlfriend, Lana, has a picnic with her fiancee at the secret place in the mountains. The couple discovers Mr. Griffin’s medicine bottle for his heart condition. Informing the police, they also mention there was a patch of dirt that looked like it had been recently uprooted. The police check it out, and find Mr. Griffin's body buried in the hole. Brian Griffin's murder is all over the news.
David’s grandmother finds the ring David took that had belonged to Mr. Griffin. She mistakenly believes it belongs to David's father, who left David’s mother a long time ago. David's grandmother believes David has been secretly meeting with his father, and that's why he's been acting so strange lately. David's mother does not take his grandmother seriously, but the conspirators know they need to hide or destroy the ring since it is evidence of their crime. However, the grandmother will not return the ring to David until she gets to meet with David's father.
David's grandmother is killed, a neighbor referring to the killer as a "boy in a brown sweater." When David learns that she is dead, he is overcome with grief and takes no further part in the plot. Susan makes the connection, knowing that Mark has a brown sweater he wears all the time, and that Mark would stop at nothing to get what he needed - in this case, the ring.
Susan then threatens to tell the police all that the group has done. Mark orders Jeff and Betsy to bind Susan and they leave. Mark tells Susan what really happened to his father - that he set their house on fire and killed him. Susan realizes that he's going to do the same to her. He sets her curtains on fire. Susan also realizes she hates him, but loves him. Miraculously, Susan is saved by Kathy Griffin, who recognizes her husband's Chevy in Susan's driveway when she sees Susan's house on fire. Though the car had been repainted, the gray color can't be made out in the dark, and Mrs. Griffin recognizes the patched upholstery.
The conspiracy unravels with all of those involved facing varying degrees of criminal charges, except for Susan who is granted amnesty in exchange for her testimony at Mark's murder trial. The novel ends with Susan's mother telling her that Mark will be blamed for manipulating her along with the other students, because he has been diagnosed as a psychopath.