What do you prefer, E-Book or Manual Book?

well i generally download e-books, especially those that are free, but i admit i am always more comfortable in reading manual books because i feel more incovenient to read on computer. also eye-strain on computer is greater and i already have weak eye-sight and manual books can be read whenever i wish too.

I'll always prefer a real book. I cannot imagine to read a novel on my laptop, it won't be same same relaxing experience as lying on the bed reading a good book.