Neither mcmaster or carrlane is going to carry any kind of substantial book on jigs and fixtures. Try a tooling supply distributor such as MSC or J&L. Depending on what you are doing, most jig and fixture work is just a common sense approach of what works practically and what doesn't. I've been in this game for 22 years, and my book on the subject has been gathering dust for nearly that long! I take my first sentence back, I just took a peek at McMaster, and they do have one.
There is title "Jig and Fixture Design Manual" at mcmaster
but I am looking for something more specialized to aircraft assembly and manufacture. Any ideas?