1000 GEFAHREN - AUF DEM PIRATENSCHIFF (HB)

1000 GEFAHREN - UNTER DINOSAURIERN (HB)

1000 GEFAHREN AM KATASTROPHENTAG (PB)

1000 GEFAHREN IM STRAFRAUM (PB)

1000 GEFAHREN IM WELTALL /1 (PB)

1000 GEFAHREN ZUR GEISTERSTUNDE (PB)

ABOMINABLE SNOWMAN (PB)

BLOOD ON THE HANDLE (PB)

CAVE OF TIME

CHINESE DRAGONS (PB)

CHOOSE YOUR OWN ADVENTURE 4-BOOK BOXED SET #2 (MYSTERY OF THE MAYA, HOUSE OF DANGER, RACE FOREVER, ESCAPE)

CHOOSE YOUR OWN ADVENTURE 4-BOOK BOXED SET NINJA BOX (SECRET OF THE NINJA, TATTOO OF DEATH, THE LOST NINJA, RETURN OF THE NINJA)

CHOOSE YOUR OWN ADVENTURE 6-BOOK BOXED SET #2

CHOOSE YOUR OWN ADVENTURE: BLANK BOOK (WRITE YOUR OWN ADVENTURE)

CHOOSE YOUR OWN ADVENTURE: CHINESE DRAGONS (PB)

CHOOSE YOUR OWN ADVENTURE: EXILED TO EARTH (PB)

CHOOSE YOUR OWN ADVENTURE: HOUSE OF DANGER (PB)

CHOOSE YOUR OWN ADVENTURE: JOURNEY TO ATLANTIS (PB)

CHOOSE YOUR OWN ADVENTURE: LOST ON THE AMAZON (PB)

CHOOSE YOUR OWN ADVENTURE: MOON QUEST (PB)

CHOOSE YOUR OWN ADVENTURE: MYSTERY OF THE MAYA (PB)

CHOOSE YOUR OWN ADVENTURE: PROJECT UFO (PB)

CHOOSE YOUR OWN ADVENTURE: RETURN TO DORADO (PB)

CHOOSE YOUR OWN ADVENTURE: SEARCH FOR THE YETI (PB)

CHOOSE YOUR OWN ADVENTURE: SILVER WINGS (PB)

CHOOSE YOUR OWN ADVENTURE: SMOKE JUMPERS (PB)

CHOOSE YOUR OWN ADVENTURE: TASK FORCE: U.N (PB)

CHOOSE YOUR OWN ADVENTURE: TATTOO OF DEATH (PB)

CHOOSE YOUR OWN ADVENTURE: THE DESTINY DEVICE (PB)

CHOOSE YOUR OWN ADVENTURE: THE JEWELS OF NABOOTI (PB)

CHOOSE YOUR OWN ADVENTURE: THE WHOLE DRAGONLARK ENCHILADA

CHOOSE YOUR OWN ADVENTURE: TRACK STAR (PB)

DANGER ZONES (PB)

DAREDEVIL PACK (PB)

DER URWALD DER 1000 GEFAHREN (PB)

DIE INSEL DER 1000 GEFAHREN (PB)

ESCAPE

EVEREST ADVENTURE (PB)

FIRE! (PB)

FORECAST FROM STONEHENGE

GUS VS. THE ROBOT KING

HAUNTED HOUSE

HORROR HOUSE (PB)

JOURNEY TO THE YEAR 3000 (PB)

KATASTROPHENTAG (PB)

KIDNAPPED (PB)

LOST DOG!

LOST JEWELS OF NABOOTI (PB)

LOST ON THE AMAZON

MAGIC MASTER (PB)

MOTOCROSS MANIA (PB)

MUTINY (PB)

MYSTERY OF CHIMNEY ROCK

MYSTERY OF THE MAYA (PB)

MYSTERY OF THE MAYA (PB)

OWL TREE

PLANET OF SORROWS (PB)

POLAR BEAR EXPRESS (PB)

PRISONER OF THE ANT PEOPLE

PRISONER OF THE ANT PEOPLE (PB)

PRIX DE EUROPE (PB)

RACE FOREVER

RACE FOREVER (PB)

RACE FOREVER (PB)

REPORT ON THE ROCKY MOUNTAIN LOCUST AND OTHER INSECTS NOW INJURING OR LIKELY TO INJURE FIELD AND GARDEN CROPS IN THE WESTERN STATES AND

RETURN TO ATLANTIS

RETURN TO ATLANTIS (PB)

RETURN TO HAUNTED HOUSE

ROLLER STAR (PB)

SAND CASTLE

SECRET OF THE DOLPHINS (PB)

SILVER WINGS (PB)

SKATEBOARD MASTER (PB)

SMOKE JUMPER (PB)

SMOKE JUMPERS

SOCCER STAR (PB)

SPACE AND BEYOND (PB)

SPACE PUP

SPACE VAMPIRE (PB)

STOCK CAR CHAMPION (PB)

SUPERBIKE (PB)

SUPERCOMPUTER (PB)

THE ANATOMY, HISTOLOGY, AND EMBRYOLOGY OF LIMULUS POLYPHEMUS

THE BRILLIANT DR. WOGAN (PB)

THE ISLAND OF NEVERMORE (PB)

THE LOST NINJA (PB)

THE REALITY MACHINE (PB)

THE WORST DAY OF YOUR LIFE (PB)

THROUGH THE BLACK HOLE (PB)

TRACK OF THE BEAR (PB)

TROUBLE ON PLANET EARTH

VAMPIRE INVADERS (PB)

VIKING RAIDERS (PB)

WAR WITH THE EVIL POWER MASTER

WAR WITH THE EVIL POWER MASTER (PB)

YOU ARE A GENIUS (PB)

YOU ARE A MILLIONAIRE (PB)

YOU ARE A SHARK (PB)

YOU ARE A SUPERSTAR (PB)

YOUR VERY OWN ROBOT GOES CUCKOO-BANANAS!

ZOOLOGY FOR HIGH SCHOOLS AND COLLEGES

ZOOLOGY FOR HIGH SCHOOLS AND COLLEGES (1889)