The first titles 'The Observers Book of British Birds' and 'British Wild Flowers' were published by Frederick Warne in 1938, subsequently over 97 different titles appeared in this very collectable series.
Nature subjects were covered at first but eventually many diverse and quite unusual titles were published like 'The Observers book of Folk Song in Britain'.
After 1983, other but less regarded titles and reprints were published by Penguin and it's subsiduaries, the series finally came to an end in 1992.

This link is to our own indepth resource which has full information on all of the titles in this series.

Although best remembered for his occult series of books, the author has written many others, including espionage, crime and thrillers.

This external site is a geat reference source which chronicles and describes all his works, details first editions, titles and variants and lots of other interesting facts.

The ABC 'train spotter' books published by Ian Allan from the 1940's onwards eventually covered many types of transportation, and have become very collectable.
The series of ABC books has carried on into modern times, but this range is now limited to aircraft and railway subjects.

This link is to an external site with illustrations of the front covers of virtually all editions

The 'Red' guides first appeared in the late 19th century and eventually covered almost every region of the UK.
The early books are of most interest, containing not only a gazetteer of the time, but period adverts and maps of the regions covered.
Their distingushing red covers were revamped around 1950 and continued on until their demise in the 1970s.

This link is to an informed external site which covers every aspect for the enthusiast and collector