Free Giant Yo-Yo Mystery by Gertrude Chandler Warner

stories. In each, she chose a special setting and introduced unusual or eccentric characters who liked the unpredictable.
    While the mystery element is central to each of Miss Warner’s books, she never thought of them as strictly juvenile mysteries. She liked to stress the Aldens’ independence and resourcefulness and their solid New England devotion to using up and making do. The Aldens go about most of their adventures with as little adult supervision as possible — something else that delights young readers.
    Miss Warner lived in Putnam, Connecticut, until her death in 1979. During her lifetime, she received hundreds of letters from girls and boys telling her how much they liked her books.

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
    T HE 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
    T HE B LACK P EARL M YSTERY
    T HE C EREAL B OX M YSTERY
    T HE P ANTHER M YSTERY
    T HE M YSTERY OF THE Q UEEN’S J EWELS
    T HE S TOLEN S WORD M YSTERY
    T HE B ASKETBALL M YSTERY
    T HE M OVIE S TAR M YSTERY
    T HE M YSTERY OF THE P IRATE’S M AP
    T HE G HOST T OWN M YSTERY
    T HE M YSTERY OF THE B LACK R AVEN
    T HE M YSTERY IN THE M ALL
    T HE M YSTERY IN N EW Y ORK
    T HE G YMNASTICS M YSTERY
    T HE P OISON F ROG M YSTERY
    T HE M YSTERY OF THE E MPTY S AFE
    T HE H OME R UN M YSTERY
    T HE G REAT B ICYCLE R ACE M YSTERY
    T HE M YSTERY OF THE W ILD P ONIES
    T HE M YSTERY IN THE C OMPUTER G AME
    T HE M YSTERY AT THE C ROOKED H OUSE
    T HE H OCKEY M YSTERY
    T HE M YSTERY OF THE M IDNIGHT D OG
    T HE M YSTERY OF THE S CREECH O WL
    T HE S UMMER C AMP M YSTERY
    T HE C OPYCAT M YSTERY
    T HE H AUNTED C LOCK T OWER M YSTERY
    T HE M YSTERY OF THE T IGER’S E YE
    T HE D ISAPPEARING S TAIRCASE M YSTERY
    T HE M YSTERY ON B LIZZARD M OUNTAIN
    T HE M YSTERY OF THE S PIDER’S C LUE
    T HE C ANDY F ACTORY M YSTERY
    T HE M YSTERY OF THE M UMMY’S C URSE
    T HE M YSTERY OF THE S TAR R UBY
    T HE S TUFFED B EAR M YSTERY
    T HE M YSTERY OF A LLIGATOR S WAMP
    T HE M