1)The Tower Treasure

2)The House on The Cliff

3)The Secret Of The Old Mill

4)The Missing Chums

5)Hunting For Hidden Gold

6)The Shore Road Mystery

7)The Secret Of The Caves

8)The Mystery Of Cabin Island

9)The Great Airport Mystery

10)What happened At Midnight

11)While The Clock Ticked

12)Footprints Under The Window

13)The Mark On The Door

14)The Hidden Harbor Mystery

15)The Sinister Signpost

16)A Figure In Hiding

17)The Secret Warning

18)The Twisted Claw

19)The Disappearing Floor

20)The Mystery Of The Flying Express

21)The Clue Of The Broken Blade

22)The Flickering Torch Mystery

23)The Melted Coins

24)The Short-Wave Mystery

25)The Secret Panel

26)The Phantom Freighter

27)The Secret of Skull Mountain

28)The Sign Of The Crooked Arrow

29)The Secret Of The Lost Tunnel

30)The Wailing Siren Mystery

31)The Secret Of Wildcat Swamp

32)The Crisscross Shadow

33)The Yellow Feather Mystery

34)The Hooded Hawk Mystery

35)The Clue In The Embers

36)The Secret Of Pirates' Hill

37)The Ghost Of Skeleton Rock

38)Mystery At Devils Paw

39)The Mystery Of The Chinese Junk

40)Mystery Of The Desert Giant

41)The Clue Of The Screeching Owl

42)The Viking Symbol Mystery

43)The Mystery Of The Aztec Warrior

44)The Haunted Fort

45)The Mystery Of The Spiral Bridge

46)The Secret Agent On Flight 101

47)Mystery Of The Whale Tatoo

48)The Artic Patrol Mystery

49)The Bombay Boomarang

50)Danger On Vampire Trail

51)The Masked Monkey

52)The Shattered Helmet

53)The Clue of The Hissing Serpent

54)The Mysterious Caravan

55)The Witchmater's Key

56)The Jungle Pyramid

57)The Firebird Rocket

58)The Sting Of The Scorpion

59)Night Of The Werewolf

60)Mystery Of The Samurai Sword

61)The Pentagon Spy

62)The Apeman's Secret

63)The Mummy Case

64)Mystery Of Smugglers Cove

65)The Stone Idol

66)The Vanishing Thieves

67)The Outlaw's Silver

68)Deadly Chase ( Orignialy Known as The Submarine Caper)

69)The Four-Headed Dragon

70)The Infinity Clue

71)Track Of The Zombie

72)The Voodoo Plot

73)The Billion Dollar Ransom

74)Tic-Tac-Terror

75)Trapped At Sea

76)Game Plan For Disaster

77)The Crimson Flame

78)Cave-In ( later retitled as Cave-In!)

79)Sky Sabotage

80)The Roaring River Mystery

81)The Demon's Den

82)The Blackwing Puzzle

83)The Swamp Monster

84)Revenge Of The Desert Phantom

85)The Skyfire Puzzle

86)The Mystery Of The Silver Star

87)Program For Destruction

88)Tricky Business

89)The Sky Blue Frame

90)Danger On The Diamond

91)Shield Of Fear

92)The Shadow Killers

93)The Serpent's Tooth Mystery

94)Breakdown In Axeblade

95)Danger On The Air

96)Wipeout

97)Cast of Criminals

98)Spark Of Suspension

99)Dungeon Of Doom

100)The Secret Of The Island Treasure

101)The Money Hunt

102)Terminal Shock

103)The Million-Dollar Nightmare

104)Tricks Of The Trade

105)The Smoke Screen Mystrery

106)Attack Of The Video Villains

107)Panic On Gull Island

108)Fear On Wheels

109)The Prime-Time Crime

110)The Secret Of The Sigma Seven

111)Three-Ring terror

112)The Demolition Mission

113)Radical Moves

114)The Case Of The Countereit Criminals

115)Sabotage At Sports City

116)Rock'N'Roll Renegades

117)The Baseball Card Conspiracy

118)Danger In The Fourth Dimension

119)Trouble At Coyote Canyon

120)The Case of The Cosmic Kidnapping

121)The Mysteryt In The Old Mine

122)Carnival Of Crime

123)The Robot's Revenge

124)Mystery With A Dangerous Beat

125)Mystery On Manatunk Island

126)Racing To Disaster

127)Reel Thrills

128)Day Of The Dinosaur

129)The Treasure Of Dolphin Bay

130)Sidetracked To Danger

131)Crusade Of The Flaming Sword

132)Maximum Challenge

133)Crime In The Kennel

134)Cross-Country Crime

135)The Hypersonic Secret

136)The Cold Cash Caper

137)High-Speed Showdown

138)The Alsakan Adventure

139)The Search For The Snow Leopard

140)Slam Dunk Sabotage

141)The Desert Thieves

142)Lost In Gator Swamp

143)The Giant Rat Of Sumatra

144)The Secret Of Skeleton Reef

145)Terror At High Tide

146)The Mark Of The Blue Tattoo

147)Trial And Terror

148)The Ice-Cold Case

149)The Chase For The Mystery Twister

150)The Crisscross Crime

151)The Rocky Road To Revenge

152)Danger In The Extreme

153)Eye On Crime

154)The Caribbean Cruise Caper

155)The Hunt For The Four Brothers

156)A Will To Survive

157) The Lure Of The Italian Treasure

158)The London Deception

159)Daredevils

160)A Game Called Chaos

161)Training For Trouble

162)The End Of The Trail

163)The Spy That Never Lies

164)Skin & Bones

165)Crime In The Cards

166)Past And Present Danger

167)Trouble Times Two

168)The Castle Conundrum

169)Ghost Of A Chance

170)Kickoff To Danger

171)The Test Case

172)Trouble In Warp Space

173)Speed Times Five

174)Hide-And-Sneak

175)Trick-Or-Trouble

176)In Plane Sight

177)The Case Of The Psychic's Vision

178)The Mystery Of The Black Rhino

179)Passpart To Danger

180)Typhoon Island

181)Double Jeopardy

182)The Secret Of The Soldier's Gold

183)Warehouse Rumble

184)The Dangerous Transmission

185)Wreck And Roll

186)Hidden Mountian

187)NoWay Out

188)Farming Fear

189)One False Step

190)Motocross Madness

Well...i Think that is enough for now. of Course you can find many of these books at my store!