List of Titles with their Number and their 1st published dates. Where there is a 2nd or 3rd similar title this is where the book has been reissued with a slightly different title, as in the Observer's Books British Birds became The Observer's books of Birds. Each title links to an image and some further information about the book.

1 . BRITISH BIRDS 1937
     BIRDS 1954
2. BRITISH WILD FLOWERS 1937
    WILD FLOWERS 1954
3. BRITISH BUTTERFLIES 1938
    BUTTERFLIES 1954
4. TREES & SHRUBS OF THE BRITISH ISLES 1938
    TREES & SHRUBS 1954
    TREES 1960
5. BRITISH WILD ANIMALS 1938
    WILD ANIMALS OF THE BRITISH ISLES 1954
    WILD ANIMALS 1971
6. FRESHWATER FISHES OF THE BRITISH ISLES 1941
    FRESHWATER FISHES 1955
7. BRITISH GRASSES, SEDGES AND RUSHES 1942
   GRASSES, SEDGES AND RUSHES 1955
8. DOGS 1945
9. HORSES AND PONIES 1949
10. BRITISH GEOLOGY 1949
     GEOLOGY 1955

(No number issued.) AIRPLANES 1942
11. AIRCRAFT 1949
12. BRITISH FERNS 1949
      FERNS 1954
13. BRITISH ARCHITECTURE 1949
     ARCHITECTURE 1954
14. THE LARGER BRITISH MOTHS 1952
      LARGER MOTHS 1954
15. SHIPS 1952
16. MUSIC 1953
17. COMMON BRITISH INSECTS AND SPIDERS 1953
      COMMON INSECTS AND SPIDERS 1954
      INSECTS OF THE BRITISH ISLES 1978
18. BRITISH BIRDS' EGGS 1954
      BIRDS' EGGS 1954
19. COMMON FUNGI 1954
      MUSHROOMS, TOADSTOOL AND OTHER COMMON FUNGI 1977
20. MOSSES AND LIVERWORTS 1955
21. AUTOMOBILES 1955
22. WEATHER 1955
23. RAILWAYS LOCOMOTIVES OF BRITAIN 1955
. (continued as)  BRITISH STEAM LOCOMOTIVES 1974
24. POND LIFE 1956
25. GARDEN FLOWERS 1957
26. PAINTING AND GRAPHIC ART 1958
27. CACTI AND OTHER SUCCULENTS 1958
28. SEA FISHES 1958
29. FLAGS 1959
30. CATS 1959
31. SEAS AND SEASHORE 1962
32. ASTRONOMY 1962
33. LICHENS 1963
34. MODERN ART 1964
35. FURNITURE 1964
36. OLD ENGLISH CHURCHES 1965
37. SCULPTURE 1966
38. BASIC AIRCRAFT-CIVIL 1967
39. BASIC AIRCRAFT-MILITARY 1967
40. COMMERCIAL VEHICLES 1967
41. HERALDRY 1967
42. POSTAGE STAMPS 1967
43. CATHEDRALS 1972
44. FLOWERING TREES AND SHRUBS [ FOR GARDENS ] 1972
45. ZOO ANIMALS 1972
46. HOUSE PLANTS 1972
47. ASSOCIATION FOOTBALL 1972 SOCCER 1978
     
48. MANNED SPACEFLIGHT 1972
49. CRICKET 1973
50. LONDON 1973
51. POTTERY AND PORCELAIN 1973
52. UNMANNED SPACEFLIGHT 1974
53. MOTOR SPORT 1975
54. EUROPEAN COSTUME 1975
55. BRITISH AWARDS AND MEDALS 1974
56. ANCIENT AND ROMAN BRITAIN 1976
57. SEWING 1975
58. GOLF 1975
59. COARSE FISHING 1976
60. SHOW JUMPING AND EVENTING 1976
61. MOTORCYCLES 1976
62. GLASS 1976
63. TOURIST ATLAS OF GREAT BRITAIN AND IRELAND 1976
64. SMALL CRAFT 1976
65. TROPICAL FISHES 1976
66. FARM ANIMALS 1976
67. VEGETABLES 1977
68. FLY FISHING 1977
69. COINS 1977
      BRITISH COINS 1980
70. SEASHELLS OF THE BRITISH ISLES 1977
71. FOSSILS 1977
72. PETS 1978
73. THE COTSWOLDS & SHAKESPEARE COUNTRY 1978
74. THE LAKE DISTRICT 1978
75. FIREARMS 1978
76. JAZZ 1978
77. BIG BANDS 1978
78. CASTLES 1979
79. CATERPILLARS 1979
80. ROCKS AND MINERALS 1979
81. TENNIS 1981
82. SEA FISHING 1980
83. DEVON AND CORNWALL 1980
84. ROSES 1980
85. HERBS 1980
86. Country Houses, but not published
87. FOLK SONG IN BRITAIN 1980
88. SILVER 1980
89. TANKS & OTHER ARMOURED VEHICLES 1981
90. VICTORIANA 1981
91. WORLD ATLAS 1981
92. VINTAGE CARS and PRE-WAR CLASSICS 1982
93. CLASSIC CARS AFTER 1945 - publsihed1982
94. PARIS 1982
95. CANALS 1982
96. GARDENS OF ENGLAND , SCOTLAND & WALES 1982
97. KITCHEN ANTIQUES 1982
98. OPERA 1982
99. OBSERVER'S BOOKS 1999
100. WAYSIDE and WOODLAND 2003