Just thought I’d add if anyone has not seen them, that the following items are also available:
From Retro Gamer: The Commodore 64 Book (I think it’s been on shelves for a while now). The book reversed is also The ZX Spectrum book. This did confuse me the first time I looked at it as I saw the words ‘ZX Spectrum’ and looked no further, only chancing on a version facing the right way some time later.
Additionally some recent Kickstarter projects: Commodore Amiga a visual Compendium & Commodore 64 a visual Compendium plus the DVD From Bedroom to Billions are all available on offer as a set at Funstock.co.uk which I just treated myself to a few seconds ago.