Some of my guides, I only collect the official guides published by GCT, but i've also picked up a couple published post-war by the Corporation Information Bureau.
The photo quality in these isn't great, and they tend to be small, but some quite interesting views I think.
1906. A rather whimsical cover, especially the treatment given to the city coat of arms
The new style guides didn't really change that much, just different covers for each year, and perhaps a few minor updates inside.
In the 1920's GCT also published guides for those looking to explore further, hillwalkers would take trams to the furthest outreaches of the city. This is how Tom Weir got started,
No photos in these books, they consist of text, sketches, and some rather nice watercolours.