I use a couple of on-line dscussion forums, and on one the subject of 'advanced' books came up, during which I mentioned 'old', 'new', and 'very new' Roadcraft, the police training manual.
I was asked which particular 'old' (also known as 'The Blue Book') one I meant, as that person had three versions.
So I opened the 'training' cupboard and started to get out the book collection . . .
.