[Trisquel-users] reading epub and mobi files on Trisquel

[strypey]

I just found all four novels of the Fall Revolution series by Ken Macleod for  
download (https://libcom.org/library/cassini-division-ken-macleod), two books  
to a file, with versions in .epub format, which I've struggled to open on  
GNU/Linux before, and .mobi format. I've read 3 out of the 4, and they're  
excellent. I can't wait to read 'The Sky Road'. Has anyone here had any luck  
reading ebooks on Trisquel on .epub or .mobi before? If they are inherently  
bad for some reason (eg DRM built in), what is the best ebook format to use  
for reading books on Trisquel?