Thanks for the pointers. I already have the last Bob Tait IR book and while that's a fine read (even the last version has outdated references but that's probably a lost battle anyway), with all due respect to Bob, I find the flow of the text somewhat broken at times. I think he should read once through it and give it a polishing touch. That's why I'm looking for the Aviation Theory Centre equivalent. I don't care if references are out of date because I always cross check them by default and will be updating them along the way.