I followed the link provided by STL in the thread about the new Transformers Generations book and discovered that there's a Machine Men equivalent book also available.
http://www.millionhero.jp/mr/ga.html
It's a couple of years old but it's new to me!
I'm going to see if I can track down a copy for me. I have a couple of Machine Men toys and while the cartoon never engaged me the toys were always of interest to look at.
I like the look of the Machine Men equivalent of Duocons for instance shown in one the preview pages for instance that I've never seen. The Motorbike/Sidecar combination is great.
An English language review is available here:
http://www.counter-x.net/gobots/arti...dge/index.html
From the preview images you can see it's very similar in style to Generations with simiarly nice photos of all the toys in both modes.