Warbirds Worldwide, IMHO, gave the best warbird specific in-depth coverage of any magazine/periodical during it's time. I had always wondered how 'they' built / re-built such machines, and WW offered a wonderful insight into the 'nuts and bolts' of it, together with some top-notch photography, reproduced on quality glossy paper.
My copies, purchased before it's unfortunate demise, will give me pleasure for many years to come.