The titles in bold (v. 21-23, 26, 28-34, 36-37, 39-41) DO NOT exist in pictorial cover format.

The titles in italics (35, 38, 42-46) (original text only) are very hard to find in pictorial cover format since they were discontinued in 1974.

Big RiverRoosterCandy CastleDoodlebugFunnyboneGiraffeSun-MoonFreedomSmokyTV MysteryCoral Turtle
1The Bobbsey Twins of Lakeport19501961XXXXXXXXXXX
2The Bobbsey Twins’ Adventure in the Country19501961XXXXXXXXXXX
3The Bobbsey Twins’ Secret at the Seashore19501962XXXXXXXXXXX
4The Bobbsey Twins’ Mystery at School19131962XXXXXXXXXXX
5The Bobbsey Twins’ Mystery at Snow Lodge19131960XXXXXXXXXXX
6The Bobbsey Twins on a Houseboat19151955XXXXXXXXXXX
7The Bobbsey Twins’ Mystery at Meadowbrook19151963XXXXXXXXXXX
8The Bobbsey Twins’ Big Adventure at Home19161960XXXXXXXXXXX
9The Bobbsey Twins’ Search in a Great City19171960XXXXXXXXXXX
10The Bobbsey Twins on Blueberry Island19171959XXXXXXXXXXX
11The Bobbsey Twins’ Mystery on the Deep Blue Sea19181965  XXXXXXXXX
12The Bobbsey Twins’ Adventure in Washington19191963XXXXXXXXXXX
13The Bobbsey Twins’ Vistit to the Great West19201966  XXXXXXXXX
14The Bobbsey Twins and the Cedar Camp Mystery19211967  XXXXXXXXX
15The Bobbsey Twins at the County Fair Mystery19221960XXXXXXXXXXX
16The Bobbsey Twins Camping Out19231955XXXXXXXXXXX
17The Bobbsey Twins and Baby May19241968  XXXXXXXXX
18The Bobbsey Twins and the Play House Mystery19251968   XXXXXXXX
19The Bobbsey Twins and the Four-Leaf Clover Mystery19261968   XXXXXXXX
20The Bobbsey Twins’ Mystery at Cherry Corners19271971    XXXXXXX
21The Bobbsey Twins and their Schoolmates1928no rev
22The Bobbsey Twins Treasure Hunting1929no rev
23The Bobbsey Twins at Spruce Lake1930no rev
24The Bobbsey Twins’ Wonderful Secret19311962XXXXXXXXXXX
25The Bobbsey Twins and the Circus Surprise19321960XXXXXXXXXXX
26The Bobbsey Twins on an Airplane Trip1933            
27The Bobbsey Twins Solve a Mystery1934 XXXXXXXXXXX
28The Bobbsey Twins on a Ranch1935            
29The Bobbsey Twins in Eskimo Land1936            
30The Bobbsey Twins in a Radio Play1937            
31The Bobbsey Twins at Windmill Cottage1938            
32The Bobbsey Twins at Lighthouse Point1939            
33The Bobbsey Twins at Indian Hollow1940            
34The Bobbsey Twins at the Ice Carnival1941            
35The Bobbsey Twins in the Land of Cotton1942 XXXXXX     
36The Bobbsey Twins in Echo Valley1943            
37The Bobbsey Twins on the Pony Trail1944            
38The Bobbsey Twins at Mystery Mansion1945 XXXXXX     
39The Bobbsey Twins at Sugar Maple Hill1946            
40The Bobbsey Twins in Mexico1947            
41The Bobbsey Twins Toy Shop1948            
42The Bobbsey Twins in Tulip Land1949 XXXXXX     
43The Bobbsey Twins in Rainbow Valley1950 XXXXXX     
44The Bobbsey Twins Own Little Railroad1951 XXXXXX     
45The Bobbsey Twins at Whitesail Harbor1952 XXXXXX     
46The Bobbsey Twins and the Horseshoe Riddle1953 XXXXXX     
47The Bobbsey Twins at Big Bear Pond1953 XXXXXXXXXXX
48The Bobbsey Twins on a Bicycle Trip1954 XXXXXXXXXXX
49The Bobbsey Twins Own Little Ferryboat1956 XXXXXXXXXXX
50The Bobbsey Twins at Pilgrim Rock1957 XXXXXXXXXXX
51The Bobbsey Twins Forest Adventure1958 XXXXXXXXXXX
52The Bobbsey Twins at London Tower1959 XXXXXXXXXXX
53The Bobbsey Twins in the Mystery Cave1960 XXXXXXXXXXX
54The Bobbsey Twins in Volcano Land1961 XXXXXXXXXXX
55The Bobbsey Twins and the Goldfish Mystery1962 XXXXXXXXXXX
56The Bobbsey Twins and the Big River Mystery1963 XXXXXXXXXXX
57The Bobbsey Twins and the Greek Hat Mystery1964  XXXXXXXXXX
58The Bobbsey Twins Search for the Green Rooster1965  XXXXXXXXXX
59The Bobbsey Twins and their Camel Adventure1966   XXXXXXXXX
60The Bobbsey Twins Mystery of the King’s Puppet1967   XXXXXXXXX
61The Bobbsey Twins and the Secret of Candy Castle1968   XXXXXXXXX
62The Bobbsey Twins and the Doodlebug Mystery1969    XXXXXXXX
63The Bobbsey Twins and the Talking Fox Mystery1970     XXXXXXX
64The Bobbsey Twins and the Red, White and Blue Mystery1971     XXXXXXX
65The Bobbsey Twins Dr. Funnybone’s Secret1972     XXXXXXX
66The Bobbsey Twins and the Tagalong Giraffe1973      XXXXXX
67The Bobbsey Twins and the Flying Clown1974       XXXXX
68The Bobbsey Twins on the Sun-Moon Cruise1975       XXXXX
69The Bobbsey Twins The Freedom Bell Mystery1976        XXXX
70The Bobbsey Twins and the Smoky Mountain Mystery1977         XXX
71The Bobbsey Twins in a TV Mystery Show1978          XX
72The Bobbsey Twins and the Coral Turtle Mystery1979           X
 Total Available Titles  3335424549504546474849