America's #1 real estate expert personally prefers InterNACHI inspectors.

In Robert Irwins book Tips & Traps When Buying A Home, America's #1 real estate expert writes that he personally prefers InterNACHI inspectors.
This quote from page 200: 
"Where Do You Find a Home Inspector?
Ask your real estate agent.  Usually active agents know of one they can recommend.  However, also be wary.  Although it seldom happens, it might be that an agent recommends a particular inspector mainly because he or she has a track record of going easy on the property, thereby helping to make the deal go through.
Look on the internet.  There are several national organizations that can recommend inspectors.  My personal favorite is (International Association of Certified Home Inspectors)."
Robert Irwin is the author of over 60 books on real estate investing that have sold over a million copies.  He has appeared on hundreds of radio and television shows. He is the author of McGraw-Hill's bestselling Tips and Traps series as well as The Home Buyer's Checklist, How to get Started in Real Estate Investing, How to Buy a Home When you can't afford it and The Armchair Real Estate Investor (where he exclusively featured InterNACHI).