The Secret of Shadow Ranch No. 1
1979, Armada Books, 0006910734 ·
The Mystery of the 99 Steps No. 2
1987, Armada Books, 0006910742 ·
Mystery at the Ski Jump No. 3
The Spider Sapphire Mystery No. 4
The Clue in the Crossword Cipher No. 5
1971, Collins, 0001604058 ·
The Quest of the Missing Map No. 6
1981, Armada Books, 0006911471 ·
1987, Armada Books, 0006922376 ·
The Clue in the Old Stagecoach No. 7
1974, Armada Books, 000690887X ·
The Clue of the Broken Locket No. 8
The Message in the Hollow Oak No. 9
The Invisible Intruder No. 10
1978, Armada Books, 0006911463 ·
The Ghost of Blackwood Hall No. 11
Password to Larkspur Lane No. 12
1976, Armada Books, 0006911617 ·
The Bungalow Mystery No. 13
The Whispering Statue No. 14
The Haunted Showboat No. 15
1983, Armada Books, 0006922058 ·
The Clue of the Dancing Puppet No. 16
1981, Armada Books, 0006913369 ·
The Clue of the Tapping Heels No. 17
The Clue in the Crumbling Wall No. 18
The Mystery of the Tolling Bell No. 19
The Clue of the Black Keys No. 20
The Clue of the Leaning Chimney No. 21
The Scarlet Slipper Mystery No. 22
1983, Armada Books, 0006917283 ·
The Secret of the Golden Pavilion No. 23
The Secret in the Old Attic No. 24
The Ringmaster’s Secret No. 25
Nancy’s Mysterious Letter No. 26
The Phantom of Pine Hill No. 27
1986, Armada Books, 0006919146 ·
The Mystery of the Fire Dragon No. 28
The Mystery of the Moss-Covered Mansion No. 29
The Mystery of the Ivory Charm No. 31
The Mystery of the Brass-Bound Trunk No. 32
The Clue of the Velvet Mask No. 33
The Clue in the Old Album No. 34
1967, Sampson Low ·
Armada Books, 0006925049 ·
The Witch Tree Symbol No. 35
The Moonstone Castle Mystery No. 36
The Secret of Mirror Bay No. 37
The Double Jinx Mystery No. 38
Mystery of the Glowing Eye No. 39
The Secret of the Forgotten City No. 40
The Strange Message in the Parchment No. 41
1993, Armada Books, 0006928145 ·
Mystery of Crocodile Island No. 42
The Secret of Red Gate Farm No. 43
The Secret of the Wooden Lady No. 44
The Clue of the Whistling Bagpipes No. 46
1989, Armada Books, 0006928196 ·
The Mysterious Mannequin No. 47
The Crooked Bannister No. 48
The Sky Phantom No. 49
The Thirteenth Pearl No. 50
The Triple Hoax No. 51
The Flying Saucer Mystery No. 52
The Secret in the Old Lace No. 53
The Greek Symbol Mystery No. 54
The Swami’s Ring No. 55
The Kachina Doll Mystery No. 56
1983, Armada Books, 0006918433 ·
The Twin Dilemma No. 57
The Captive Witness No. 58
The Mystery of the Winged Lion No. 59
Race Against Time No. 60
The Sinister Omen No. 61
The Elusive Heiress No. 62
The Clue in the Ancient Disguise No. 63
The Broken Anchor No. 64
The Silver Cobweb No. 65
The Haunted Carousel No. 66
1984, Armada Books, 0006921736 ·
Enemy Match No. 67
The Mysterious Image No. 68
The Emerald-Eyed Cat Mystery No. 69
The Eskimo’s Secret No. 70
The Bluebeard Room No. 71
1986, Armada Books, 0006921914 ·
The Phantom of Venice No. 72
The Secret of the Old Clock No. 73
The Mystery at Lilac Inn No. 74
The Clue in the Diary No. 75
The Sign of the Twisted Candles No. 76
The Haunted Bridge No. 77
The Clue in the Jewel Box No. 78
The Wild Cat Crime No. 141
1998, Minstrel Books, 0671001205 ·