I bought a copy of this book when I acquired my Saracen from @Tootyred on this here forum. The red one I acquired wasn't like the black ones used to take up Kilimanjaro but yours has some similarities. The wishbone brake hanger looks similar to the ones in the book. These are lovely bikes to ride. A lot of the expensive bespoke bikes you get now for gravel biking etc are just re-runs of these lovely steel ATBs. Great to explore on.