Annie Salone has a youtube channel with videos of how to paint effectively and how to wax-I found them really useful. I have to agree about it not always wearing well, it's lasted on my daughter's cot and a set of drawers but is coming off on the corners of a wardrobe I painted which gets a lot of use and knocked quite easily.
Even if you don't wax it then it won't leave a residue on your books but it will mark the bookcase less if you wax it. I use the Rustoleum range from B&Q as it's cheaper than Annie Sloan - I think Wilkos might even do their own brand now as well
Annie Sloan also makes a water-based varnish which I find easier and much more hardy than the wax. It does have a slight sheen, like all matte garnishes, so you lose the chalky look - not a problem for me, but may be for you.
I'm now thinking of just doing it in eggshell as it's got to be hardwearing and I don't do a lot of painting, so I think I might be better off doing something I know I can manage rather than needing to learn new techniques.