Are you sure you don't mean David Scopickhttp://www.davidscopick.com/? He had at least two editions of his gum printing books. I have both. I don't know that he didn't write one but I don't recall any by Livick and a quick search didn't find one.
I have a print-out of the PDF of Steven Livick's gum printing book. He still has a website that has recent postings on it - the images are mostly now photos of wildlife taken with LONG telephoto lenses. I would say to contact him about getting a copy but he's put out the giant middle finger on his website and does not want to be contacted (www.livick.com). Give the folks at Bostick & Sullivan a call - they might have a hard copy or two sitting around, or know where you can get one.