Thanks, I've not managed to get my hands on the book but have read a few snippets. I've certainly read as many of Colton's papers as I can find :) For anyone w

Thanks, I've not managed to get my hands on the book but have read a few snippets. I've certainly read as many of Colton's papers as I can find :) For anyone who's interested, I've got an ever-growing Bibtex file at http://chriswarbo.net/git/writing/branches/master/Bibtex.bib http://chriswarbo.net/git/writing/branches/master/Bibtex.bib which contains many references on this topic (all mixed up with completely unrelated stuff though!).