[nickpeterson]

I used to rely on the file type:pdf argument to find ebooks. It used to be trivial to find most ebooks this way. Now it doesn’t work at all, I’m completely sure Google broke this functionality to keep publishers happy. A similar example is googling a phone number, which never works.

[linuxftw]

The new search term to add for finding books is 'epub'. This will yield what you want if it's reasonably available.