Reading material on a screen is actually more mentally draining. This is my suggestion for those that want a short cut/cheat. Simply download this free text-to-speech software called
balabolka. You can upload your PDFs, EPUBs, TXTs, Word Files etc. and it can read it to you at whatever speed you choose. You will get through your reading material in a fraction of the time it takes you.
It's believed to help with reading comprehension and error detection as well if one is writing. The only downside is the mono-toned voice. If you prefer a paid software
NaturalReader is a decent alternative with better sounding voices than say, Microsoft David.