Just seen an advance copy of 'All Screwed Up' by UK thread chasing expert John Berkeley. It is absolutely fantastic and tells you how to chase threads in clear detail and then goes on to show you how to make about 20 threaded puzzles (copies but updated from Victorian originals).
It isn't expensive (about £16 in UK) and the quality of it is excellent.
Stobart Davies are the publishers - aparently 3000 copies have been ordered initially for the US market. The UK launches them at the Alexandra Palace show on 22nd February.
Just thought you might be interested
Paul