The Mystery of the Guide Dog by Gertrude Chandler WarnerBenny - He is one of the Alden children. He is six years old..Jessie - She is one of Alden's children. She is twelve years old. Henry - He is one of the Alden children. He is 14 years old. Violet – She is one of Alden's children. She is ten years old. Grandpa Alden – He is the grandfather of the Alden children. They live with him.Jason Peters – He is a trainer at Greenfield Guide Dog School.Ms. Carter - She is the owner of the Greenfield Guide Dog School.Ginger - She is a Golden Retriever who is a guide dog.Mrs. Davis – It was a woman who owned Ginger. Gerard Dominick – This is a man who wants to buy Ginger. The setting of the story is the small town of Greenfield and the Greenfield Guide Dog School. Henry, Jessie, Violet and Benny Alden had gone to downtown Greenfield to pick up some things for dinner. Outside the grocery store, they encounter a blindfolded man, led by a golden retriever. The man was Jason Peters, who worked at the Greenfield Guide Dog School owned by Ms Carter who they soon met. Mrs. Carter went to school with their grandfather Alden. Mrs. Carter talks with Grandpa Alden and asks if the kids can come help at the guide dog school for a week. Grandpa says yes, and the kids pack up and are dropped off at school. At school, while Jason was showing the kids how he trained a guide dog, a big black car drove up and a woman got out. Ginger ran towards the woman. The woman, Mrs. Davis, owned Ginger. Jason and Mrs. Davis spoke. Jason was angry that she was there. The woman left. Anna Chang, a blind girl, came to the school to start working with a guide dog. The children quickly became friends with Anna. While Jason was talking to Anna, Benny saw a well-dressed man hiding in the woods. Anna received Ginger as her new guide dog. Later, a man came to Mrs. Carter's office while the children were working there and wanted to buy some Ginger. The children told him he needed to talk to Mrs. Carter. The children told Mrs. Carter about the man..