The Real Book is available (and legitimate) electronically, as well as many other Fake books. These can be incorporated into applications that run on tablets that allow you to find any song by typing in a few characters of the name or composer. You can put your tablet on a specially made stand and dial up any of thousands of tunes of any genre, and then transpose into any key with just a tap of the finger.
There’s also an app you can run on your phone to turn the page. The phone hooks up to the tablet via Bluetooth, and if you bump the phone with your foot it turns the page on the tablet.