Kindle PaperWhite! Though reading a book has it's own charm, at this point of time the books that i want to read, paperwhite is just fine.

Are you using that to read technical books?

GoodReader for iPad, on an iPad Air 2. It has fast PDF rendering, intuitive but powerful features for highlighting and file management, and cost something like 10USD.

I'll buy a printer soon. I spend way too much time in front of screens.

phone,book, tablet. I read ebooks like I read webpages, quickly jump to the pages I need

phone, as it is always in my pocket. At home, epaper is more confortable though.

Kindle

www.kat.cr

Transmission BitTorrent Client

PDF

Document Reader for Ubuntu