POWER BUILDER 1
1．BRAVE BALLERINA 1
2．THE TREASURE OF SANIBEL ISLAND 5
3．MARLIN PERKINS'WORLD 9
4．MISSISSIPPI STEAMBOAT DAYS 13
5．NEWYORK'S BIG DITCH 17
6．THE DAY THE BIG TOP BURNED 21
7．THE BEAU CATCHER 25
8．DANGER IN SPACE 29
9．RAIN IS BORN 33
10．TRAVELING STUDENTS 37
11．CATS ARE NO GOOD BUT 41
12．TOUGH TEEN TO TENNIS QUEEN 45
13．THE TEN-GALLON HAT 49
14．TAME VOLCANOES 53
15．FREEDOM FROM PAIN 57
16．NORTH OF THE ARCTIC CIRCLE 61
RATE BUILDER 65
KEY 1 81
KEY 2 89
NOTES 90