The Give Yourself Goosebumps book where you join a club.
You are the new kid in town, and you have trouble making friends. One day, a kid named Nick informs you of a club he is in called the Horror Club. The Horror Club meets late at night in an old mansion called Bat Wing Hall, which is said to be haunted. The members of the Horror Club are going on a scavenger hunt to find out if Bat Wing Hall is really haunted. You are asked to pick which team to join from there.
If you join the Red team, you discover your teammates are monsters. If you join the Blue team, you get turned into a bat. Either way, you must try to escape Bat Wing Hall alive.
This book provides examples of:
- Admiring the Abomination: In the Blue Team Storyline, you can encounter the ghost of Bat Wing Hall, Professor Krupnik, and get him to reveal himself to your friends. Only for your friends to exclaim, "Cool, a real ghost!"... at the end of the story, the ghost of Krupnik ends up an honorary member of the Blue Team and one of your best friends.
- Animorphism: This book stands out, showing the changed form (a bat) on the cover. one bad ending from the Blue Team scenario have your friends Marcie, Lara and Martin getting turned into bats as well.
- Cassandra Truth: In the Blue Team storyline, you're given the option to attempt convincing your new friends that Bat Wing Hall really is haunted. It doesn't work.
- Dead All Along: This actually happens to you in one ending. You are given a boat ride by a figure who (while never referred to as such) is clearly the Grim Reaper based on the book's description, and when the ride ends you are at a crypt, and realize that you can see through your own body, and your name has been written on the crypt.
- Go-Karting with Bowser: One scenario in the Red Team storyline — AFTER you discover Nick and your new friends are actually hostile monsters — have you challenging Nick to a video game duel. If you win, you can leave Bat Wing Hall and return home; if you lose, you fail your quest on the spot, at which point you then transformed into a fourth monster. Now that you're stuck permanently with Nick and the other monsters, you then asks if he's interested in a rematch.
- Horror Hunger: If you go with the Blue Team and turn into a bat, you develop a craving for insects even while in human form. One ending has you arrested for eating rare beetles on display in a science emporium. While in jail you come up with a brand new flavor of ice cream, Beetle Berry Crunch. Three guesses as to what's the secret ingredient.
- Intercontinuity Crossover: One of the Red Team scenarios have you challenging Nick and the other mosters to a video game duel. The name of the game? "Mud Monsters".
- The Pig-Pen: Connor from the Red Team storyline, who is so filthy you think "he smells like a dumpster" just by standing near him. Then again, he's a monster in disguise, as you found out if you joined Nick's team.
- Puppy Love: "You" have a crush on Lara, both of you being around 11-12 years old (although the book assumes "you" are male.) Comes into play more if you do the Blue Team storyline.
- Race Against the Clock: The Red Team Storyline has the player completing a scavenger hunt before 12 midnight, or else they will be transformed into a monster forever.
- Taken for Granite: One ending has you overhearing Debbie mentioning why new members of the Horror Club mysteriously turn to stone. Then, it happens to you.
- Time Travel: To complete the Red Team storyline, the player will need to travel all the way back to Ancient Egypt to recover a necessary component for the scavenger hunt, and then travel back to the present. Unfortunately, a poor choice might lead to the player returning to the timeline... AFTER midnight, and then turning into a monster and failing the whole adventure.
- Was Once a Man: One of the really good endings if you pick the red team storyline is that, by successfully completing the scavenger hunt, you've transformed Nick, Debbie, and Connor into humans. Nick then starts telling a story about a group of kids who were turned into monsters and could only be saved if someone completed a really dangerous hunt...
- What Happened to the Mouse?: Right in the first page, you befriend Nick, who invites you to a haunted house gathering; you're given the option to stay on Nick's team, which is Red, or follow the partner team instead, which is Blue. If you choose to follow the Blue Team, you will NEVER mention Nick again for the rest of the story, even in the sub-plot where you can choose a friend to help you after being turned into a bat. Inversely, if you choose the Red Team, the Blue Team members disappear and are never mentioned again.