Boardwalk Mystery by Gertrude Chandler Warner

Miss Warner received requests for more adventures involving Henry, Jessie, Violet, and Benny Alden, she began additional 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
    THE BOXCAR CHILDREN
    SURPRISE ISLAND
    THE YELLOW HOUSE MYSTERY
    MYSTERY RANCH
    MIKE’S MYSTERY
    BLUE BAY MYSTERY
    THE WOODSHED MYSTERY
    THE LIGHTHOUSE MYSTERY
    MOUNTAIN TOP MYSTERY
    SCHOOLHOUSE MYSTERY
    CABOOSE MYSTERY
    HOUSEBOAT MYSTERY
    SNOWBOUND MYSTERY
    TREE HOUSE MYSTERY
    BICYCLE MYSTERY
    MYSTERY IN THE SAND
    MYSTERY BEHIND THE WALL
    BUS STATION MYSTERY
    BENNY UNCOVERS A MYSTERY
    THE HAUNTED CABIN MYSTERY
    THE DESERTED LIBRARY MYSTERY
    THE ANIMAL SHELTER MYSTERY
    THE OLD MOTEL MYSTERY
    THE MYSTERY OF THE HIDDEN PAINTING
    THE AMUSEMENT PARK MYSTERY
    THE MYSTERY OF THE MIXED-UP ZOO
    THE CAMP-OUT MYSTERY
    THE MYSTERY GIRL
    THE MYSTERY CRUISE
    THE DISAPPEARING FRIEND MYSTERY
    THE MYSTERY OF THE SINGING GHOST
    MYSTERY IN THE SNOW
    THE PIZZA MYSTERY
    THE MYSTERY HORSE
    THE MYSTERY AT THE DOG SHOW
    THE CASTLE MYSTERY
    THE MYSTERY OF THE LOST VILLAGE
    THE MYSTERY ON THE ICE
    THE MYSTERY OF THE PURPLE POOL
    THE GHOST SHIP MYSTERY
    THE MYSTERY IN WASHINGTON, DC
    THE CANOE TRIP MYSTERY
    THE MYSTERY OF THE HIDDEN BEACH
    THE MYSTERY OF THE MISSING CAT
    THE MYSTERY AT SNOWFLAKE INN
    THE MYSTERY ON STAGE
    THE DINOSAUR MYSTERY
    THE MYSTERY OF THE STOLEN MUSIC
    THE MYSTERY AT THE BALL PARK
    THE CHOCOLATE SUNDAE MYSTERY
    THE MYSTERY OF THE HOT AIR BALLOON
    THE MYSTERY BOOKSTORE
    THE PILGRIM VILLAGE MYSTERY
    THE MYSTERY OF THE STOLEN BOXCAR
    THE MYSTERY IN THE CAVE
    THE MYSTERY ON THE TRAIN
    THE MYSTERY AT THE FAIR
    THE MYSTERY OF THE LOST MINE
    THE GUIDE DOG MYSTERY
    THE HURRICANE MYSTERY
    THE PET SHOP MYSTERY
    THE MYSTERY OF THE SECRET MESSAGE
    THE FIREHOUSE MYSTERY
    THE MYSTERY IN SAN FRANCISCO
    THE NIAGARA FALLS MYSTERY
    THE MYSTERY AT THE ALAMO
    THE OUTER SPACE MYSTERY
    THE SOCCER MYSTERY
    THE MYSTERY IN THE OLD ATTIC
    THE GROWLING BEAR MYSTERY
    THE MYSTERY OF THE LAKE MONSTER
    THE MYSTERY AT PEACOCK HALL
    THE WINDY CITY MYSTERY
    THE BLACK PEARL MYSTERY
    THE CEREAL BOX MYSTERY
    THE PANTHER MYSTERY
    THE MYSTERY OF THE QUEEN’S JEWELS
    THE STOLEN SWORD MYSTERY
    THE BASKETBALL MYSTERY
    THE MOVIE STAR MYSTERY
    THE MYSTERY OF THE PIRATE’S MAP
    THE GHOST TOWN MYSTERY
    THE MYSTERY OF THE BLACK RAVEN
    THE MYSTERY IN THE MALL
    THE MYSTERY IN NEW YORK
    THE GYMNASTICS MYSTERY
    THE POISON FROG MYSTERY
    THE MYSTERY OF THE EMPTY SAFE
    THE HOME RUN MYSTERY
    THE GREAT BICYCLE RACE MYSTERY
    THE MYSTERY OF THE WILD PONIES
    THE MYSTERY IN THE COMPUTER GAME
    THE MYSTERY AT THE CROOKED HOUSE
    THE HOCKEY MYSTERY
    THE MYSTERY OF THE MIDNIGHT DOG
    THE MYSTERY OF THE SCREECH OWL
    THE SUMMER CAMP MYSTERY
    THE COPYCAT MYSTERY
    THE HAUNTED CLOCK TOWER MYSTERY
    THE MYSTERY OF THE TIGER’S EYE
    THE DISAPPEARING STAIRCASE MYSTERY
    THE MYSTERY ON BLIZZARD MOUNTAIN
    THE MYSTERY OF THE SPIDER’S CLUE
    THE CANDY FACTORY MYSTERY
    THE MYSTERY OF THE MUMMY’S CURSE
    THE MYSTERY OF THE STAR RUBY
    THE STUFFED BEAR MYSTERY
    THE MYSTERY OF ALLIGATOR SWAMP
    THE MYSTERY AT SKELETON POINT
    THE TATTLETALE MYSTERY
    THE COMIC BOOK MYSTERY
    THE GREAT SHARK MYSTERY
    THE ICE CREAM MYSTERY
    THE MIDNIGHT MYSTERY
    THE MYSTERY IN THE FORTUNE COOKIE
    THE BLACK WIDOW SPIDER MYSTERY
    THE RADIO MYSTERY
    THE MYSTERY OF THE RUNAWAY GHOST
    THE