Windy City Mystery by Gertrude Chandler Warner

The Boxcar Children Mysteries
    T HE B OXCAR C HILDREN
    S URPRISE I SLAND
    T HE Y ELLOW H OUSE M YSTERY
    M YSTERY R ANCH
    M IKE ’ S M YSTERY
    B LUE B AY M YSTERY
    T HE W OODSHED M YSTERY
    T HE L IGHTHOUSE M YSTERY
    M OUNTAIN T OP M YSTERY
    S CHOOLHOUSE M YSTERY
    C ABOOSE M YSTERY
    H OUSEBOAT M YSTERY
    S NOWBOUND M YSTERY
    T REE H OUSE M YSTERY
    B ICYCLE M YSTERY
    M YSTERY IN THE S AND
    M YSTERY B EHIND THE W ALL
    B US S TATION M YSTERY
    B ENNY U NCOVERS A M YSTERY
    T HE H AUNTED C ABIN M YSTERY
    T HE D ESERTED L IBRARY M YSTERY
    T HE A NIMAL S HELTER M YSTERY
    T HE O LD M OTEL M YSTERY
    T HE M YSTERY OF THE H IDDEN P AINTING
    T HE A MUSEMENT P ARK M YSTERY
    T HE M YSTERY OF THE M IXED -U P Z OO
    T HE C AMP -O UT M YSTERY
    T HE M YSTERY G IRL
    T HE M YSTERY C RUISE
    T HE D ISAPPEARING F RIEND M YSTERY
    T HE M YSTERY OF THE S INGING G HOST
    M YSTERY IN THE S NOW
    T HE P IZZA M YSTERY
    T HE M YSTERY H ORSE
    T HE M YSTERY AT THE D OG S HOW
    T HE C ASTLE M YSTERY
    T HE M YSTERY OF THE L OST V ILLAGE
    T HE M YSTERY ON THE I CE
    T HE M YSTERY OF THE P URPLE P OOL
    T HE G HOST S HIP M YSTERY
    T HE M YSTERY IN W ASHINGTON , DC
    T HE C ANOE T RIP M YSTERY
    T HE M YSTERY OF THE H IDDEN B EACH
    T HE M YSTERY OF THE M ISSING C AT
    T HE M YSTERY AT S NOWFLAKE I NN
    T HE M YSTERY ON S TAGE
    T HE D INOSAUR M YSTERY
    T HE M YSTERY OF THE S TOLEN M USIC
    T HE M YSTERY AT THE B ALL P ARK
    T HE C HOCOLATE S UNDAE M YSTERY
    T HE M YSTERY OF THE H OT A IR B ALLOON
    T HE M YSTERY B OOKSTORE
    T HE P ILGRIM V ILLAGE M YSTERY
    T HE M YSTERY OF THE S TOLEN B OXCAR
    M YSTERY IN THE C AVE
    T HE M YSTERY ON THE T RAIN
    T HE M YSTERY AT THE F AIR
    T HE M YSTERY OF THE L OST M INE
    T HE G UIDE D OG M YSTERY
    T HE H URRICANE M YSTERY
    T HE P ET S HOP M YSTERY
    T HE M YSTERY OF THE S ECRET M ESSAGE
    T HE F IREHOUSE M YSTERY
    T HE M YSTERY IN S AN F RANCISCO
    T HE N IAGARA F ALLS M YSTERY
    T HE M YSTERY AT THE A LAMO
    T HE O UTER S PACE M YSTERY
    T HE S OCCER M YSTERY
    T HE M YSTERY IN THE O LD A TTIC
    T HE G ROWLING B EAR M YSTERY
    T HE M YSTERY OF THE L AKE M ONSTER
    T HE M YSTERY AT P EACOCK H ALL
    T HE W INDY C ITY M YSTERY

THE WINDY CITY MYSTERY
    created by
    GERTRUDE CHANDLER WARNER
    Illustrated by Charles Tang
    ALBERT WHITMAN & Company
    Morton Grove, Illinois

CHAPTER 1
    The Windy City
    â€œL ook for Chad,” Grandfather Alden said.
    He and the Alden children had just gotten off an airplane.
    â€œWe’ve never met Chad,” Henry, who was fourteen, reminded him.
    Grandfather smiled. “That’s right,” he said. “I forgot.”
    Twelve-year-old Jessie glanced around the airport. “What does he look like?”
    â€œI haven’t seen him in a long time,” Grandfather answered. “I’m not sure I’d recognize him myself.”
    â€œThere he is!” Benny said. He skipped toward a tall, thin young man.
    The others followed.
    â€œWelcome to Chicago,” the young man said.
    â€œChad Piper!” Mr. Alden said. “You’ve grown up!” He introduced Chad to the Alden children.
    Then Jessie said, “Benny, how did you know this was Chad?”
    Chad held up a sign. It read ALDENS.
    â€œI’m six!” Benny said. “I can read!”
    â€œI wasn’t sure I’d recognize you,” Chad said, leading the group down the long hall. “So I made the sign.”
    Ten-year-old Violet thought it would be fun to spend the day just watching the people come and go. “This place is really big,” she said.
    â€œO’Hare is one of the largest and busiest airports in the world,” Chad told her.
    They picked up their luggage from the carousel and went to the parking garage.

    When they were settled in the car and on their way, Chad asked the children, “Have you decided what you want to see?”
    â€œThey didn’t have much time to plan,” Mr. Alden said.
    â€œGrandfather just told us about the trip two days ago,” Henry added.
    â€œNo