Zack Taylor and Willow Creek Press put out the Trilogy, MacQuarrie Miscellany, MacQuarrie Treasury, and Fly Fishing with MacQuarrie. The other book you should read, if you like MacQuarrie is Keith Crowley's biography of Mac. Keith really did the research and you'll understand so much more after reading it.
Keith's biography lists 144 magazine articles, and he and I have found a couple more since the book. If you've read all the Zack Taylor edited books you have read 73 magazine stories. You will have most, but not all of the Old Duck Hunters stories- there are about a dozen that haven't been reprinted into book form. The rest of the magazine stories are on various other topics, not Old Duck Hunter stories, although many of them are very entertaining as well.
Mac wrote for the Milwaukee Journal from 1936-1956, about 3000 columns. I've read almost all of them, online or microfilm, and picked out many of the gems that I found entertaining and maybe you will too.The Barnes Area Historical Association (BAHA) has published two books of these Milwaukee Journal columns- the first called Right off the Reel (the name of his column) and the second called Dogs, Drink & other Drivel. Between them they have a little over 200 of Mac's best columns- some ODHA related. The books are 220 pages and 296 pages, and go for $18 and $20 plus shipping. You can go to bahamuseum.org to order them, or they are available on Amazon. (The museum makes more if you order from them). Happy reading! Dave Evenson