Another electronic version is available: The HTML version.
I have very deliberately created this file shorn of any design information. I think that anyone who needs this kind of file will want it ‘vanilla’, so-to-speak.
This is by far the smallest file size of any of the versions of the book: It is only 632 Kb. By contrast, the files used to produce the printed version of the book were 20.4 Mb in total – more than 32 times larger.