.

NumberTitleDust CoverBoldUpcoming Titles Not Owned

.

ItalicBoxed Set Or Special Edition

.

1The Tower TreasureYesBold BlueTitles Entered But Not Formatted Or Sorted

.

2The House on the CliffYesBold RedMissing Titles

.

3The Secret of the Old MillYesBold GreenWanted Titles

.

4The Missing ChumsYesBold Black with Green FillWanted Titles

.

5Hunting for Hidden GoldNoBold PurpleUnread Titles

.

6The Shore Road MysteryYesBold Purple with Yellow FillCurrently Reading

.

7The Secret of the CavesNo

.

8The Mystery of Cabin IslandYes

.

9The Great Airport MysteryYes

.

10What Happened at MidnightNo

.

11While the Clock TickedYes

.

12Footprints Under the WindowYes

.

13The Mark on the DoorYes

.

14The Hidden Harbor MysteryNo

.

15The Sinister Sign PostYes

.

16A Figure in HidingYes

.

17The Secret WarningNo

.

18The Twisted ClawNo

.

19The Disappearing FloorYes

.

20The Mystery of the Flying ExpressNo

.

21The Clue of the Broken BladeYes

.

22The Flickering Torch MysteryNo

.

23The Melted CoinsYes

.

24The Short-Wave MysteryYes

.

25The Secret PanelYes

.

26The Phantom FreighterYes

.

27The Secret of Skull MountainYes

.

28The Sign of the Crooked ArrowYes

.

29The Secret of the Lost TunnelNo

.

30The Wailing Siren MysteryYes

.

31The Secret of Wildcat SwampYes

.

32The Crisscross ShadowYes

.

33The Yellow Feather MysteryYes

.

34The Hooded Hawk MysteryYes

.

35The Clue in the EmbersYes

.

36The Secret of Pirates’ HillYes

.

37The Ghost at Skeleton RockYes

.

38The Mystery at Devil’s PawNo

.

39The Mystery of the Chinese JunkNo

.

40Mystery of the Desert GiantYes

.