Footprints (coincidentally(?) one of the charts in The Real Book, by Wayne Shorter and featuring on Miles Davis's excellent Miles Smiles album) is clearly missing the second Real Book, as this contains Bye Bye Blackbird.
It should also be noted that there are two distinct types of real book - the legal version and the illegal version. The legal version is nicely laid out and has less mistakes, but is generally considered not to have as good a selection of tunes as the illegal version, also known as the New Real Book.

Something I reckon I should add to this: The Real Book is really the essence of what jazz is all about. Each tune in the book is nothing more than a single line of tune with the chords to be played. No arrangements. Little idea of tempo or style. It just gives you the starting point for your own performance, which will be unique to yourself and unique every time you play it. Your performance of a piece really is your performance.