CONTENTS
Van Powell
I
The Deserted Airplane
5
II
At Rocky Lake
12
III
A Greater Mystery
19
IV
The Sky Squad is Formed
28
V
A Double Puzzle
36
VI
Suspicion and Suspense
42
VII
In the Falling ’Plane
53
VIII
Watchful Waiting
59
IX
Strange Actions
67
X
A Summons
76
XI
A Trail and a Flight
81
XII
The Chase
93
XIII
The Detective’s Theory
98
XIV
The Sky Squad Disobeys
104
XV
A Triple Trail
112
XVI
The “Windsock”
121
XVII
“The Case Is ‘Sewed Up’”
128
XVIII
A New Mystery
136
XIX
Tangled Threads
144
XX
A Package of Money
151
XXI
Caught and Cleared!
159
XXII
The “Mystery Crate”
171
XXIII
Bob Pursues!
179
XXIV
Suspense!
188
XXV
Crossed Wires
197
XXVI
The Sky Squad Goes Into Action
207
XXVII
Driven Down
219
XXVIII
Curt’s Discovery
227
XXIX
A Confession
235
XXX
Barney Gives a Hint
246
XXXI
“One More Problem”
257
XXXII
Flight!
268
XXXIII
The Sky Squad Wins
277
THE MYSTERY CRASH
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