CONTENTS
1 The Earthquake
2 The Mysterious Hitchhiker
3 Report from Interpol
4 Another Tremor!
5 Secret Cache
6 Brungarian Coup
7 Wall of Water!
8 A Suspect Talks
9 The Cave Monster
10 Energy from Planet X
11 An Electrical Christening
12 Exman Takes Orders
13 Disaster Strikes
14 AirBorne Hijackers
15 Kidnaped!
16 A Unique Experiment
17 An Urgent Warning
18 Earthquake Island
19 A Fiendish Machine
20 The Robot Spy’s Story
CHAPTER I
THE EARTHQUAKE
“Tom, we’re having a problem with the gyro-stabilizer,” said Mark Faber, gray-haired president of the Faber Electronics Company. “Hope you can find out what’s wrong.”
The eighteen-year-old inventor accepted the challenge with a smile. “I’ll be glad to try, sir,” he replied.
Bud Barclay, a dark-haired young flier and Tom Swift Jr.‘s closest friend, chuckled. “If anyone can get the bugs out of your new invention, genius boy here will do it!”
The two boys followed Mr. Faber and his engineers to a wooden building which was tightly guarded. Inside, a secret rocket-telemetering device was mounted on its test stand.
“As you know, Tom,” Mr. Faber began, “the
usual conditions of rocket flight will be-”
i
2 THE VISITOR FROM PLANET X
He broke off with a gasp of astonishment as the whole building suddenly began to shake.
“Good grief I” Bud exclaimed. “This isn’t part of your testing routine, is it?”
His question was drowned out by cries of alarm and the sound of cracking glass. The walls and roof were shuddering and creaking, and the concrete floor was heaving under their feet.
“Look out! The test stand’s breaking loose!” Tom warned.