When Evan Ross stays for a few days at his aunt Kathryn's, Trigger travels with him.
After meeting Andy, she and Evan find the Monster Blood in a toy store. Trigger eats a little of that and begins to grow in size causing chaos. Later, after defeating the Monster Blood, Trigger returns to its normal size.
Finally, he returns to home with Evan.
In this book, Trigger does not have much protagonism. He only appears at the end of the story with little Evan climbing over him to ask for help from his father.
Trigger returns in Monster Blood IV, accompanying Evan back to Kermit's house.
- He is a cocker spaniel.
- He has lived his entire life with Evan.
Trigger's appearance in the television episode is completely different than how he was described in the book.
- Classic Goosebumps
- Monster Blood