Secret Agent Grandma (Give Yourself Goosebumps #16)

"Reader beware--you choose the scare! GIVE YOURSELF GOOSEBUMPS! Your parents are going away so your super-cool grandma is coming to stay with you. But when you go to meet granny at the train station you start seeing double—double grannies! There's one granny on the station platform. And another one writing in lipstick on the window of the train. Which one is your real grandma? If you think she’s on the platform you find yourself face to face with a hideous monster! If you decide to jump on the train, you are surrounded by a group of angry aliens out to take over the world! The choice is yours in this scary GOOSEBUMPS adventure that's packed with over 20 super-spooky endings!"