Careful...there are 100 titles in the spoiler...did they stop at 100 surely not. I will pick out what I consider to be the most arcane to use Jim's phrase from each of the groups of 10, so ending up with a 10 of the "best" on the obscure subject scale.
Numbers
The Arcane list
1-10 7. British Grasses, Sedges and Rushes – 1942
11-20 20. Mosses and Liverworts – 1954
21-30 27. Cacti – 1957
31-40 33. Lichens – 1963
41-50 46. House Plants – 1972
51-60 57. Sewing – 1975
61-70 67. Vegetables – 1977
71-80 77. Big Bands – 1978
81-90 87. Folk Song – 1980
91-100 97. Kitchen Antiques – 1982
- Spoiler: show
- 1. British Birds - 1937
2. British Wild Flowers – 1937
3. British Butterflies – 1938
4. Trees and Shrubs of the British Isles – 1938
5. British Wild Animals – 1938
6. Freshwater Fishes of the British Isles – 1941
7. British Grasses, Sedges and Rushes – 1942
7A. Airplanes – 1942
8. Dogs – 1945
9. Horses and Ponies – 1949
10. British Geology – 1949
11. Aircraft – 1949
12. British Ferns – 1950
13. British Architecture – 1951
14. The Larger British Moths – 1952
15. Ships – 1952
16. Music – 1953
17. Common British Insects and Spiders – 1953
18. British Birds Eggs – 1954
19. Common Fungi – 1954
20. Mosses and Liverworts – 1954
21. Automobiles – 1955
22. Weather – 1955
23. Railway Locomotives of Britain – 1955
24. Pond Life – 1956
25. Garden Flowers – 1956
26. Painting and Graphic Art – 1958
27. Cacti – 1957
28. Sea Fishes – 1958
29. Flags – 1959
30. Cats – 1959
31. Sea and Seashore – 1962
32. Astronomy – 1962
33. Lichens – 1963
34. Modern Art – 1964
35. Furniture – 1964
36. Old English Churches – 1965
37. Sculpture – 1965
38. Basic Aircraft, Civil – 1967
39. Basic Aircraft, Military – 1967
40. Commercial Vehicles – 1959
41. Heraldry – 1966
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
48. Manned Space Flight - 1972
49. Cricket – 1972
50. London – 1973
51. Pottery and Porcelain – 1973
52. Unmanned Space Flight – 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 – 1975
60. Show Jumping and Eventing – 1976
61. Motorcycles – 1976
62. Glass – 1976
63. Tourist Atlas of Great Britain and Northern Ireland – 1976
64. Small Craft – 1976
65. Tropical Fish – 1976
66. Farm Animals – 1976
67. Vegetables – 1977
68. Fly Fishing – 1977
69. Coins – 1977
70. Seashells of the British Isles – 1977
71. Fossils – 1977
72. Pets – 1978
73. The Cotswolds and Shakespeare Country – 1978
74. 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 – 1980 – NOT PUBLISHED
87. Folk Song – 1980
88. Silver – 1980
89. Tanks and Other Armoured Vehicles – 1981
90. Victoriana – 1981
91. World Atlas – 1981
92. Vintage Cars and Pre–War Classics – 1982
93. Classic Cars After 1945 – 1982
94. Paris – 1982
95. Canals – 1982
96. Gardens of Britain Ireland and Wales – 1982
97. Kitchen Antiques – 1982
98. Opera – 1982
99. Observers Books – 1999
100.Wayside and woodland – 2003
Regards Neil