The archive.org conversion at https://archive.org/details/Alan_Sugar_The_Amstrad_Story_1990_Century fails, sadly...
Will take mobi, too :)
I think this is what you are looking for:
https://archive.org/details/Alan_Sugar_The_Amstrad_Story_1990_Century/mode/2up (https://archive.org/details/Alan_Sugar_The_Amstrad_Story_1990_Century/mode/2up)
The PDF is OK and I think the 'Calibre' program will then convert it to other formats.
https://en.wikipedia.org/wiki/Calibre_(software)
:)
That's the same :) as I said, sadly, the epub/mobi conversion option fails, that's a known issue for Archive.org :(