Thanks a lot for that all. I got hold of Advanced Calculus by Woods and am working through that, will take a look at Adams and Young also.
Schaum's had as you say a few problems, you can find it in Google books ...
"Feynman integration trick" - textbooks?
I was quite impressed by the use of the parametric differentiation e.g. in integrating sin(x)/x in https://www.physicsforums.com/showthread.php?t=80735. Can anyone recommend textbooks that cover this use as a strategy in evaluating integrals? Ideally...