the only book I own, is now a little out of date. But really only so far as the printers available today go.
practical 3d printing by brian evans.
Covers just about everything from printers to designing. I'd still say it's worth reading - but maybe get it from a library rather than buy it. It was last updated in 2012 - about when I bought it.
It does mention the makerbot replicator - which is what the qidi is based on.
Just a really good collection of knowlege.

I read it from cover to cover before I actually got a printer.