CBIT Yeah - I have read it and enjoyed. Not read it for a while so needs a re read. it is a great procedural crime story isn't it. I can cope with the switch in his perspective and it is ace he is still a nut job but knows how to mask it. supposedly a TV version in production - carlyle is well up for it by all accounts.
I don't think there is anything Welsh has written that I have not read - i've found all sorts of stuff - found online stuff from his Rebel Inc days and my son has bought some zines from the early 90's i've read - Clocktower and the like. His guide to Leith is good. Also some short stories he wrote for various charities that are unique/standalone.
Carspotting is interesting - written by his mate Sandy (name checked in Marabou Stork) telling tales of their youth and the Tim Bell book - Choose Life, Choose Leith is a decent read. He did a walking/talking tour of Trainspotting Leith - retired now and some other chap does them.
I'm mildly obsessed with Irvine Welsh.