I have recently added two new sections on the website. There is a small section on European authors with links to the various authors. Also a larger section about pony book libraries and pony book publishers. This includes separate pages on the 3 main pony book libraries, Collins, Crown Ponies and J. A. Allen and has lists and pics of the books. There is additionally a feature on the Stabenfeldt/Pony Publishers who are it seems the only specialist publisher of pony books. Sadly, they are an American/European business who do not publish in the UK. But more on them in an upcoming blog.
To check out the new sections here:
European authors & books
Pony libraries and publishers