For self-publishing, Amazon KDP is a user-friendly set-up. I've published five novels using this facility. I also converted
Gordon Taylor's excellent 'The Sky Beyond' into KDP format (using Mobipocket Creator) but have been unable to publish it as I cannot find the current copyright holder. It's a fascinating account of trans-oceanic air navigation before and during WW2 in Catalina flying boats. If anyone can help in this regard I would appreciate it mightily.