The following links may be useful for finding further information:

The Croquet Association (which has an online shop selling books and equipment)

The World Croquet Federation of national governing bodies.

The Croquet Results Site run by Chris Williams, which has current player rankings.

Oxford Croquet - A variety of information about everything croquet, including coaching, reference and technical material (maintained by Ian Plummer)

Croquet Resources on the Internet (maintained by Stephen Meatheringham)

The Nottingham Board, an unofficial croquet discussion mailing list.