It really is a good book, and was the best aerodynamics for models book for years. It came out in the late 70's and Eppler and others hadn't shown up yet.

You owe it to yourself to make the effort to find, "R/C MODEL AIRCRAFT DESIGN" by Andy Lennon. It's from the publisher of Model Airplane News and is in a couple of the better LHSs around here. He covers just about everything. But surprisingly doesn't write about stabilators. Or at least doesn't do a comparison to the detail that Simons did. I've also seen it on Amazon, I think.