Steve Barrett Groupie checking in here!
I have all three editions of his book and carry the latest with me to the parks - it's slim size fits nicely in my small backpack. Just got volume 3 so I can't wait until my trip next month!
Some HMs are easier to find than others. Some, I need to have CMs help me out (for some reason, I can never find the one hidden in the mural at the GMR without the aid of a CM and a flashlight -- LOL)
HM Hunting is a great way to pass the time in queue.